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Double pointer array

Pointers and 2-D arrays - C Programming Tutorial - OverIQ

Whenever a pointer to an array is dereferenced we get the address (or base address) of the array to which it points. So, on dereferencing parr, you will get *parr. The important thing to notice is although parr and *parr points to the same address, but parr's base type is a pointer to an array of 5 integers, while *parr base type is a pointer to int. This is an important concept and will be used to access the elements of a 2-D array Two-pointer technique is commonly used to solve array problems very efficiently. Whenever an array question deals with finding two numbers in an array that satisfy a certain condition, either. Two pointers is really an easy and effective technique which is typically used for searching pairs in a sorted array. Given a sorted array A (sorted in ascending order), having N integers, find if there exists any pair of elements (A [i], A [j]) such that their sum is equal to X

Two-Pointer Technique: Solving Array Problems at Light

Two Pointers Technique - GeeksforGeek

//Create your pointer int **ptr; //Assign first dimension ptr = new int*[5]; //Assign second dimension for(int i = 0; i < 5; i++) ptr[i] = new int[5]; The number of * kinda tell you how many pointers deep you are going. *ptf is a pointer to a data member, **ptr is a pointer to a pointer, and ***ptr is a pointer to a pointer to a pointer To access a two dimensional array using pointer, let us recall basics from one dimensional array. Since it is just an array of one dimensional array. Suppose I have a pointer array_ptr pointing at base address of one dimensional array. To access nth element of array using pointer we use *(array_ptr + n) (where array_ptr points to 0th element of array, n is the nth element to access and nth. Pointers and two dimensional Arrays: In a two dimensional array, we can access each element by using two subscripts, where first subscript represents the row number and second subscript represents the column number. The elements of 2-D array can be accessed with the help of pointer notation also. Suppose arr is a 2-D array, we can access any elemen

Double Pointer (Pointer to Pointer) in C - GeeksforGeek

We already know that a pointer holds the address of another variable of same type. When a pointer holds the address of another pointer then such type of pointer is known as pointer-to-pointer or double pointer.In this guide, we will learn what is a double pointer, how to declare them and how to use them in C programming Two-pointer technique: These kind of problems usually involve two pointers: One slow-runner and the other fast-runner. A classic example is to remove duplicates from a sorted array, which is available for you to practice here. There is another variation to that: One pointer starts from the beginning while the other pointer starts from the end. They move toward each other until they both meet. Two pointer algorithm is one of the most commonly asked questions in any programming interview. This approach optimizes the runtime by utilizing some order (not necessarily sorting) of the data. It is generally applied on lists (arrays) and linked lists. This is generally used to search pairs in a sorted array. This approach works in constant space

使用double pointer接住傳遞來的位址。 Pointer 與 多維陣列. array並非pointer,但array可以自動轉型成pointer,這也是array傳進function後變成pointer的理論基礎. int a[2][4] = { {1,3,5,7} , {2,4,6,8} } Pointer is a variable which holds the address of another variable and array is collection of consecutive location of a particular data type. So we can use pointer to allocate memory for an array. allocating memory for integer type can be done like.. Array values using pointer *(p + 0) : 1000 *(p + 1) : 2 *(p + 2) : 3.4 *(p + 3) : 17 *(p + 4) : 50 Array values using balance as address *(balance + 0) : 1000 *(balance + 1) : 2 *(balance + 2) : 3.4 *(balance + 3) : 17 *(balance + 4) : 50 In the above example, p is a pointer to double which means it can store address of a variable of double type. Once we have address in p, then *p will give us. There are several ways to allocate memory to double pointers. Let us discuss each of them below. 1 Using typedef keyword : This keyword is used to define a datatype for a variable. Suppose we want to declare a variable as array. Usually we declare it with normal notation as below: int intArr [10]; This is a basic declaration which tells the compiler that it is an array of 10 integer values. double pointer to 2-dim array? By vex_helix in forum C Programming Replies: 2 Last Post: 04-06-2004, 12:31 AM. Dynamic double array. By Invincible in forum C++ Programming Replies: 4 Last Post: 05-27-2002, 08:02 PM. Tags for this Thread. 10;.

C - Pointers and Two Dimensional Array - C Programming

So now we think of ** as a pointer to a pointer or the address of a pointer. Just as 1D array of ints is thought of as const int*, we can think of a 2D array as a const int** Understanding how pointers work is critical to understanding how to work with C language. Now we have discussed two types of pointers, * and * int*[] p: p is a single-dimensional array of pointers to integers. char* p: p is a pointer to a char. void* p: p is a pointer to an unknown type. The pointer indirection operator * can be used to access the contents at the location pointed to by the pointer variable. For example, consider the following declaration: int* myVariable; The expression *myVariable denotes the int variable found at.

In the two-pointer approach, pointers refer to an array's indexes. By using pointers, we can process two elements per loop, instead of just one. Common patterns in the two-pointer approach involve: Two pointers each starting from the beginning and the end until they both meet; One pointer moves at a slow pace while the other pointer moves at a. By how assign double pointer to 2D array I assume you mean, how to assign a pointer-to-double to a 2D array of double? In other words, how to assign a pointer to some element in the 2D array. Here are example declarations for pointer and array dimension. Quite different addresses! int *ptr[5]; ptr is an array of 5 pointers to int. Note that the precedence of [] is higher than *. Excellent, now it makes sense. A double pointer just simply does not skip the width (or the column) of the array since it's, well a double pointer, not a pointer to the array of such dimension Now it is an array of two pointers, which the higher dimensions of multi-dimensional arrays can be considered pointers and arrays of pointers. You cannot do this with a pointer array tho: Code: fl_arr++; Now it has members you have to refer to them. fl_arr[0]++ is allowed, but will not have the effect I think you intend. C programming resources: GNU C Function and Macro Index-- glibc reference.

Pointer to an Array in C - Tutorialspoin

I have written a lot of articles on array and pointer if you want you can see this link, C Tutorial.Nowadays many students ask me a question that how to access a multidimensional array with a pointer in C or access two dimensional array using pointers in C I have replied many students but every month I found this question in my Inbox A pointer to an array is useful when we need to pass a multidimensional array into a function. Pointer to an array is also known as an array pointer. We are using the pointer to array to access the elements of the array. It is important to know how to create a pointer to an array when working on a multi-dimension array If elements of an array are two-dimensional arrays, the array is called a three-dimensional array. Therefore, a three-dimensional array may be considered as an array of matrices. Let Arm be a 3-dimensional array or an array of matrices. The declaration of pointer and its initialization is carried out as given below Basic C programming, Array, Pointers, Array and Pointers. Logic to copy one array to another array using pointers. Step by step descriptive logic to copy one array to another using pointers. Input size and elements in first array, store it in some variable say size and source_array. Declare another array say dest_array to store copy of source.

Matrix multipliers - using a double pointer instead of an array Hey, I'm working on an openMP enabled matrix-matrix multiplier that will multiply two matrices, A and B, storing the result in C. I have been told to write it in C, of which I have no experience. Before I even begine to think about the omp options I have a few problems to overcome (actually I have many but these are my worst. pointer to a double array (1 dimensional) to a C function. Declaring array as: double xx[100]; Declaring func. int process( double *input[] ) Wrong. Make int simple. The array : T x[SIZE]; The function : void f (T a[SIZE]) {} works for any T (type) except void. Note that in the function prototype, SIZE being useless, it can be removed. void f (T a[]) {} or void f (T *a) {} note also that is is.

Two pointer approach is an essential part of a programmer's toolkit, especially in technical interviews. The name does justice in this case, it involves using two pointers to save time and space. (Here, pointers are basically array indexes) pointers and 2 dimensional arrays in c; double pointer to print 2d array in c; c matrix pointer; matrix as pointer C; c pointer to matrix; pointer to 2d array c; how to print a 2d array using pointer; return 2d array of object pointers in cpp; first element of 2d matrix pointers c; access elements of 2d array using pointers; c matrix with only.

Write a program to c++ access two dimensional array using pointer to pointers. Two dimensional array could be a matrix of n by n, where n >= 2. James. August 11, 2020 at 2:25 am · Reply. Hi there, thanks so much for keeping this site maintained and running! I just had a question regarding the syntax of allocating multi-dimensional run-time arrays; I wanted to understand exactly how this is. double pointer refrence to pointer which is refrence to array; double pointer for loop javascript; double pointer loop javascript; 2d pointer problems cpp; pointer to double pointer array; If you want to add memory to a pointer from a function, you need to pass the address of the pointer (ie. double pointer). double pointer array in c; double. o char array[] = abc sets the first four elements in array to 'a', 'b', 'c', and '\0' o char *pointer = abc sets pointer to the address of the abc string (which may be stored in read-only memory and thus unchangeable) 4) Pointer variable can be assigned a value whereas array variable cannot be The expression, (*pmatrix), declares a pointer to an array. Combined with the rest of the declaration, pmatrix is defined as a pointer to a two-dimensional array of integers with five elements per column. If we had left the parentheses off, we would have declared a five-element array of pointers to integers

Double Pointer in C How does Double Pointer work in C

  1. Using a double pointer and an array pointer. #include <stdio.h> #include <stdlib.h> #define M 3 #define N 4 // array pointer argument void pr_mat(int mm, int nn, int A[mm][nn]) { int
  2. The array is passed with the int arr[] notation of the parameter, but it is converted underneath by the compiler as the pointer to the array and we can treat it as such in the function body. Finally, it returns the pointer value directly using the variable name without taking its address with the & operator
  3. Two pointer is really an easy and effective technique which is typically used for searching pairs in a sorted arrays. Given a sorted array A (sorted in ascending order), having N integers, find if there exists any pair of elements (A[i], A[j]) such that their sum is equal to X
  4. The simplest form of the multidimensional array is the two-dimensional array. 2: Pointer to an array. You can generate a pointer to the first element of an array by simply specifying the array name, without any index. 3: Passing arrays to functions. You can pass to the function a pointer to an array by specifying the array's name without an.

- each part has its own array of doubles to store its position in space relative to other parts in the 3D drawing. ex:part a has an array of double a_pos[12] relative to the absolute point in the drawing,part b has an array of double b_pos[12] but relative to part a, c with c_pos[12] relative to part b. - I need to perform some recursive sum in order to determine the absolute position of each. What is a double-pointer? A double-pointer is a pointer to a pointer. For instance, a char pointer to pointer is declared as char** ptrptr. Let's look at a real-life example of using a char double-pointer. In the following code, the function genNumStrings() returns a dynamic array of variable length number strings (12345, 2345666, 1213313 Pointers and Arrays Edit. Up to now, we've carefully been avoiding discussing arrays in the context of pointers. The interaction of pointers and arrays can be confusing but here are two fundamental statements about it: A variable declared as an array of some type acts as a pointer to that type. When used by itself, it points to the first.

The p2multi pointer points to an array of type double of size three. In this example, the array is used with one, two, and three subscripts. Although it's more common to specify all subscripts, as in the cout statement, sometimes it's useful to select a specific subset of array elements, as shown in the statements that follow cout. Overloading subscript operator . Like other operators, the. Array of pointers with an example; Pointer to functions with an example; 1. C Constant Pointer and Pointer to Constant. As a developer, you should understand the difference between constant pointer and pointer to constant. C Constant pointer. A pointer is said to be constant pointer when the address its pointing to cannot be changed. Lets take an example : char ch, c; char *ptr = &ch ptr = &c. In C/C++, arrays and pointers have similar semantics, except on type information. As an example, given a 3D array int buffer[5][7][6]; An element at location [2][1][2] can be accessed as buffer[2][1][2] or *( *( *(buffer + 2) + 1) + 2). Observe the following declaration T *p; // p is a pointer to an object of type T. When a pointer p is pointing to an object of type T, the expression *p.

One, Two-Dimensional (2D) Arrays and Pointers in

TYPE(C_PTR), INTENT(IN), VALUE :: array_ptr INTEGER(C_INT), INTENT(IN), VALUE :: array_size !---- REAL(C_DOUBLE), POINTER :: array(:) INTEGER :: i !**** CALL C_F_POINTER(array_ptr, array, [array_size]) FORALL (i = 1:SIZE(array)) array(i) = REAL(i) END SUBROUTINE fortran_sub [/fortran] But if the Fortran procedure is really just going to work on. Working of C++ Pointers with Arrays. Note: The address between ptr and ptr + 1 differs by 4 bytes. It is because ptr is a pointer to an int data. And, the size of int is 4 bytes in a 64-bit operating system. Similarly, if pointer ptr is pointing to char type data, then the address between ptr and ptr + 1 is 1 byte. It is because the size of a character is 1 byte. Example 1: C++ Pointers and. Here, in the initialization of p in the first for loop condition, the array a decays to a pointer to its first element, as it would in almost all places where such an array variable is used. Then, the ++p performs pointer arithmetic on the pointer p and walks one by one through the elements of the array, and refers to them by dereferencing them with *p. PDF - Download C Language for free.

The syntax for declaring a pointer is as follows −. int *p; Here, 'p' is a pointer variable which holds the address of other variable. Initialization of a pointer. Address operator (&) is used to initialize a pointer variable. For example, int qty = 175; int *p; p= &qty; Array of Pointers. It is collection of addresses (or) collection of. This can be handled via a switch statement. However, an array of function pointers is far more elegant. This is particularly true when the application has multiple user screens, with some key definitions changing from screen to screen (i.e., the system uses soft keys). In this case, a two dimensional array of function pointers is often used Here we create two arrays and two int pointers. We assign the numbers variable to ptr1 and numbers2 variable to ptr2. We then assign ptr2 to ptr1. Finally we print the output we can see that ptr1 and ptr2 are both pointing to the first element of the numbers2 array. Conclusion . I hope you have enjoyed this overview of arrays and pointers in C. We haven't covered everything there is to know. In another instance, we may want to tell SWIG that double *result is the output value of a function. Similarly, we might want to map a datatype of float[4] into a 4 element tuple. This chapter describes advanced methods for managing pointers, arrays, and complex datatypes. It also describes how you can customize SWIG to handle new kinds of. Point pt = new Point(); // Using fixed allows the address of pt members to be taken, // and pins pt so that it is not relocated. fixed (int* p = &pt.x) { *p = 1; } } Sie können einen Zeiger mit einem Array, einer Zeichenfolge, einem Puffer fester Größe oder der Adresse einer Variablen initialisieren

Before you start with Pointer and Arrays in C, learn about these topics in prior: Array in C. Pointer in C. When an array in C language is declared, compiler allocates sufficient memory to contain all its elements. Its base address is also allocated by the compiler See complete series on pointers in C/C++ here:http://www.youtube.com/playlist?list=PL2_aWCzGMAwLZp6LMUKI3cc7pgGsasm2_See part 2 of this lesson here:https://w.. Pointers, Arrays, and Functions in Arduino C. An in-depth introduction to how Arduino arrays and Arduino functions work in C; including an introduction to function pass by value and pass by reference. TorqueWrench. Read more posts by this author. TorqueWrench. 27 Apr 2019 • 7 min read. Now that we've completed our introduction to pointers, I had really wanted to move on and wrap up our. A character array in double quotes, where there is no fixed size, will have a NUL-character at the end. But any other arrays will have nothing more in them than what you put there - unless you specify a size, and it is an initalized array, the rest of the array is filled with zeros. --Mats Compilers can produce warnings - make the compiler programmers happy: Use them! Please don't PM me for.

Arrays (C++) Microsoft Doc

  1. Two Dimensional Array. A 2D array stores data in a list with 1-D array. It is a matrix with rows and columns. To declare a 2D array, use the following syntax: type array-Name [ x ][ y ]; The type must be a valid C++ data type. See a 2D array as a table, where x denotes the number of rows while y denotes the number of columns. This means that you identify each element in a 2D array using the.
  2. Finding Triangle Triplets using Two Pointer. We can sort the array, and bruteforce the longest edge, and perform a two pointer algorithm on the remainder two numbers. If the sum of the less two is bigger than the longest, then we need to accumulate the answer by the difference of the two pointers, and move one pointer towards the smaller one. If the sum of two is smaller than the longest, the.
  3. Two Dimensional Pointer Array 5 ; How to get the response from a telnet server? 10 ; string pointer Array problem 2 ; Array problem in C 10 ; pass by help 6 .NET pointer value change from C++ to C# 1 ; Array and strings 12 ; dynamically calling method in Java 2 ; function double pointer argument 5 ; Coordinate Sorting Program almost working - need array help 3 ; On Rollover hand mouse Tkinter.
  4. Ok, but there must be a way of using double pointer arrays, h_buffer00 works well, I do not understand why passing a double pointer array to the kernel does not work. Is not a debugging issue, I just need to know how to pass double pointer arrays to the device. If I create a function in the host and pass the h_buffer00 array it will works, I do not understand why it does not work in the device.
  5. Now, the two given array are already sorted, so we can put two pointers at the end of each array, say i is pointing arr1[n-1] and j is pointing arr2[m-1]. A third pointer k pointing to arr1[n+m-1]. then we start comparing values at the pointers i and j, the larger value will be stored at the pointer k thereby decreasing the pointer with larger value by 1 and decreasing the pointer k by 1. We.
  6. In this case, all string literals occupy 34 bytes and 20 bytes are occupied by the array of pointers i.e sports. So, just by creating an array of pointers to string instead of array 2-D array of characters we are saving 21 bytes (75-54=21) of memory.. It is important to emphasize that in an array of pointers to strings, it is not guaranteed that the all the strings will be stored in contiguous.

double pointer array in c Code Example - codegrepper

There is not much changes in program except for pointer notation instead of array notation. To add two matrices in array notation we use res[i][j] = mat1[i][j] + mat2[i][j] (where res is resultant array to store sum of mat1 and mat2). Now, instead of using array notation we can use pointer notation Nochmal, erste Zeile, double *d; unser Pointer, *d zeigt auf den Datentyp double, double ist 8 Bytes groß. Wenn ich jetzt zu irgendeiner Adresse, z.B. 420000, die in meiner Pointervariablen d steht, 3 dazu addiere, erhalte ich als Ergebnis 420024, also 420000 plus 3 * 8, Ursprungsadresse plus 3 mal Größe des Datentyps. Das selbe funktioniert auch mit dem ++ oder -- Operator, ebenso += und -= You forgot to have p1 point back to the beginning. In something like this, I wouldn't be modifying the pointer. You can treat the pointer like an array: p1[I]. Random Note: You forgot to call delete to free resources. Edit: You also have not copied anything. Your for loop continuously updates p2 and p1 until they are both way out of bounds, but. 12.7 Array und Zeiger. Um Irrtümer gleich zu vermeiden: Arrays und Zeiger sind nicht das Gleiche, auch wenn dies im Verlauf dieses Kapitels den Anschein hat. Ein Zeiger ist die Adresse einer Adresse, während ein Array-Name nur eine Adresse darstellt. Dieser Irrtum, dass Array und Zeiger dasselbe sind, beruht häufig darauf, dass Array- und Zeigerdeklarationen als formale Parameter einer.

Pointer to Pointer (Double Pointer) in C - Codeforwi

The pointer array p is pointed by a double pointer pp. However, the above image gives you a brief idea about how the memory is being allocated to the array a and the pointer array p. The elements of p are the pointers that are pointing to every element of the array a. Since we know that the array name contains the base address of the array hence, it will work as a pointer and can the value can. Not quite: if you just pass the 2D array, then you are passing by reference because it means that you pass a pointer to the first array. Alternatively, you can wrap the 2D array in a struct, then pass a pointer to the struct object instead. EDIT: Oh, I did not see that you edited your post #1 to include code. In this case, using a struct.

There are two ways to pass dynamic 2D array to a function: 1) Passing array as pointer to pointer( int **arr) Using new operator we can dynamically allocate memory at runtime for the array. New operator returns the address of the space allocated .This method Passes array reference as double pointer to the function along with rows and columns Array of pointers. Since we have four integer pointers so, we can either create four separate integer pointer variables like ptr1, ptr2, ptr3 and ptr4. Or, we can create one single integer array of pointers ptr variable that will point at the four variables. In the following example we are creating an array of integer pointers ptr of size 4

Arrays sind nullbasiert: Der Index eines Arrays mit n Elementen beginnt bei 0 und endet bei n-1. Arrays are zero indexed: an array with n elements is indexed from 0 to n-1. Arrayelemente können einen beliebigen Typ aufweisen, z. B. auch einen Arraytyp. Array elements can be of any type, including an array type This doesn't work because a pointer to a pointer is not the same thing as a 2D array. A 2D array is an array of arrays. Contrary to what you might think... arrays and pointers are not the same thing. If you want a pointer to the actual 2D array 2.2 We allocate data for this managed array and want to pass it to an unmanaged API in a DLL as a double int pointer (i.e. int**), not a SAFEARRAY. 2.3 We expect the unmanaged API to display values from this array. 2.4 Thereafter, we want the API to de-allocate the array. re-allocate a new one, fill it with values and return this new array to the managed code, all via the double int pointer. 2.

Data Structures In The Real World — Linked List – Journey

2D array with double pointer - Programming Questions

double pointer - C++ Foru

  1. Pointer to Pointer or Double Pointer Example Program /* Pointer to Pointer locates/store to another pointer variable address. The dereference operator or indirection operator, noted by asterisk (*), is also a unary operator in c languages that uses for pointer variables
  2. See complete series on pointers here http://www.youtube.com/playlist?list=PL2_aWCzGMAwLZp6LMUKI3cc7pgGsasm2_In this lesson, we will discuss the relationship.
  3. The semantics of arrays in C dictate that the array name is the address of the first element of the array. Hence in the assignment to a, the 8th character of the array is taken by offsetting the value of array_place by 7, and moving the contents pointed to by the resulting address into the al register, and later into a.. On the other hand, the semantics of pointers are quite different

How to access two dimensional array using pointers in C

In most contexts, array names decay to pointers. In simple words, array names are converted to pointers. That's the reason why you can use pointers to access elements of arrays. However, you should remember that pointers and arrays are not the same. There are a few cases where array names don't decay to pointers Pointer arithmetic, arrays, and the magic behind indexing. In the section above, you learned that arrays are laid out in memory sequentially. In the previous lesson, you learned that a fixed array can decay into a pointer that points to the first element (element 0) of the array • Ein Array an sich (ohne Indizierung, bezeichnet mit x oder x[]) ist in C++ eigentlich nichts anderes als ein Zeiger auf seine erste Komponente. Ubergibt man es an eine Funktion, so wird nur der Zeiger weitergereicht:¨ Nach der Variablendeklaration double x[n]; wird bei dem Aufruf f(x); nur der Zeiger auf x (bzw. x[0]), ubergeben. Zugriffe der Form¨ x[i]; werden immer, also auch.

Delphi duplex printing - Stack Overflow

Pointer to an Array Array Pointer - GeeksforGeek

Chapter 22: Pointers to Pointers. Since we can have pointers to int, and pointers to char, and pointers to any structures we've defined, and in fact pointers to any type in C, it shouldn't come as too much of a surprise that we can have pointers to other pointers.If we're used to thinking about simple pointers, and to keeping clear in our minds the distinction between the pointer itself and. Visual C++ DLL in nutzen - Pointer und Array of Double? Ein Thema von Tumm · begonnen am 15. Sep 2007 · letzter Beitrag vom 16. Sep 2007 Antwort Seite 2 von 2 Vorherige : 1: 2: SirThornberry (Moderator) Registriert seit: 23. Sep 2003 Ort: Bockwen 12.235 Beiträge. Can you point out similarities or differences between them? The similarity is: The type of both the variables is a pointer to char or (char*), so you can pass either of them to a function whose formal argument accepts an array of characters or a character pointer. Here are the differences: arr is an array of 12 characters. When compiler sees. In C++, both float and double data types are used for floating-point values. Floating-point numbers are used for decimal and exponential values. For example, // creating float type variables float num1 = 3.0f; float num2 = 3.5f; float num3 = 3E-5f; // 3x10^-5 // creating double type variables double num4 = 3.0; double num5 = 3.5; double num6 = 3E-5; // 3x10^- I've got an array of pointers to a structure called struct mys. The structure has an int value called id. I want to use qsort to sort this array of pointers to structure in ascending order by the id value in each of the structures referenced. Hope I'm making sense. Here is the code I've tried

Use of double pointer in functions DaniWe

Thanks for asking me to answer. It was pleasure. A thing of beauty is joy forever. Do you like Euler's Identity? I just love it. Back to classes : What is a double pointer? Consider this code : [code]struct counter{ long long counter; } struct in.. In computer science, a pointer is an object in many programming languages that stores a memory address.This can be that of another value located in computer memory, or in some cases, that of memory-mapped computer hardware.A pointer references a location in memory, and obtaining the value stored at that location is known as dereferencing the pointer. As an analogy, a page number in a book's.

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Initializing a double Array in Java. Arrays are declared with [] (square brackets). If you put [] (square brackets) after any variable of any type only that variable is of type array remaining variables in that declaration are not array variables those are normal variables of that type An array of arrays (i.e. a two-dimensional array in C) decays into a pointer to an array, not a pointer to a pointer. Pointers to arrays can be confusing, and must be treated carefully. (The confusion is heightened by the existence of incorrect compilers, including some versions of pcc and pcc-derived lint's, which improperly accept assignments of multi-dimensional arrays to multi-level pointers. Advantage of pointer. 1) Pointer reduces the code and improves the performance, it is used to retrieving strings, trees, etc. and used with arrays, structures, and functions.. 2) We can return multiple values from a function using the pointer.. 3) It makes you able to access any memory location in the computer's memory.. Usage of pointer. There are many applications of pointers in c language

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