/*function pointer example in c.*/ #include <stdio.h> //function: sum, will return sum of two //integer numbers int addTwoNumbers(int x, int y) { return x + y; } int main() { int a, b, sum; //function pointer declaration int (*ptr_sum)(int, int); //function ...
Here, we are going to learnhow to make a valid pointer as a NULL pointer in C programming language? ByIncludeHelpLast updated : March 10, 2024 Prerequisite An Example of Null pointer in C Any pointer that contains a valid memory address can be made as aNULL pointerby assigning0. ...
In the above example we defined two characters (‘ch’ and ‘c’) and a character pointer ‘ptr’. First, the pointer ‘ptr’ contained the address of ‘ch’ and in the next line it contained the address of ‘c’. In other words, we can say that Initially ‘ptr’ pointed to ‘ch...
CServer Side ProgrammingProgramming Array Of Pointers Just like any other data type, we can also declare a pointer array. Advertisement - This is a modal window. No compatible source was found for this media. Declaration datatype *pointername [size]; For example, int *p[5]; //It represen...
In C programming language, we can have a concept of Pointer to a function known as function pointer in C. In this tutorial, we will learn how to declare a function pointer and how to call a function using this pointer. To understand this concept, you sho
In the above example : We declared two variables var1 and var2 A constant pointer ‘ptr’ was declared and made to point var1 Next, ptr is made to point var2. Finally, we try to print the value ptr is pointing to. So, in a nutshell, we assigned an address to a constant pointer...
Example of double Pointer Lets write a C program based on the diagram that we have seen above. #include<stdio.h>intmain(){intnum=123;//A normal pointer pr2int*pr2;//This pointer pr2 is a double pointerint**pr1;/* Assigning the address of variable num to the ...
Example 2: Using Generic Pointers for Arrays This example demonstrates using avoid*pointer to access elements of an integer array. </> Copy #include <iostream> using namespace std; void printArray(void* arr, int size) { int* intArr = static_cast<int*>(arr); // Cast to int* ...
Apointer to pointeracts similarly to an ordinary pointer, except that it modifies the actual value associated with the pointer to which it points. To put it another way, the memory address held in an ordinary pointer is capable of being changed. Let’s consider a simple example: ...
Let’s have an example in which we’ll use the sizeof() function to determine the size of various variables whose datatypes differ. Set the initial values for four variables named a, b, c and d using the datatypes int, char, float and double respectively. int a = 10; char b = 'x...