In the above example, we used a character pointer ‘ptr’ that points to character ‘ch’. In the last line, we change the value at address pointer by ‘ptr’. But if this would have been a pointer to a constant, then the last line would have been invalid because a pointer to a c...
Example of Pointer to Function in C#include <stdio.h> int sum(int x, int y) { return x+y; } int main( ) { int (*fp)(int, int); fp = sum; int s = fp(10, 15); printf("Sum is %d", s); return 0; } Copy25Complicated Function Pointer example...
Lets understand this with the help of an example: Here we have a functionsumthat calculates the sum of two numbers and returns the sum. We have created a pointer f2p that points to this function, we are invoking the function using this function pointer f2p. intsum(intnum1,intnum2){ret...
We can pass a null pointer to a function argument when we are not willing to pass any actual memory address. Example 1: int * aInt = NULL; Example 2: int fun(int *ptr) { return 15; } fun(NULL); Example 3: if (aINT != NULL) { //some code} else {//some code} Related Arti...
Here, we will learnhow to pass a string (character pointer) in a function, where function argument is void pointer. Consider the given example #include<stdio.h>//function prototypevoidprintString(void*ptr);intmain(){char*str="Hi, there!";printString(str);return0;}//function definitionvoid...
In the following example we regard the task to perform one of the four basic arithmetic operations. The taskisfirst solvedusingaswitch-statement. Then itisshown, how the same can be doneusinga function pointer. It's only an example and the task is so easy that I suppose nobody will ...
1. Transfer into function the pointer of An data array: Take the example of my project: "Audio_Goertzel_Algorithm" 【声数函,方括号;调函数,没括号】 //---Some delaration in main() function: --- float data_Re[1024]; // Array of Real part of data float data_Im[1024...
In this program, a pointer variable ptr and normal variable d of type structure Distance is defined. The address of variable d is stored to pointer variable, that is, ptr is pointing to variabled. Then, the member function of variable d is accessed using pointer. ...
For example, int *int_ptr ### int_ptr is a pointer to data of type integer char *ch_ptr ### ch_ptr is a pointer to data of type character double *db_ptr ### db_ptr is a pointer to data of type double Note: The size of any pointer in C is same as the size of an unsig...
In the main function, we used typedef to define a new name for the function pointer (i.e., pair_func). Then, we defined the PairProduct of type pair_func and assigned the function abc address. After that, we called the function abc by dereferencing the pointer PairProduct (simpler synta...