how to define a function pointer in c

#include <stdio.h> int main() { int j; int i; int *p; // declare pointer i = 7; p = &i; // The pointer now holds the address of i j = *p; printf("i = %d \n", i); // value of i printf("j = %d \n", j); // value of j printf("*p = %d \n", p); // the address held by the pointer *p = 32; // asigns value to i via the pointer printf("i = %d \n", i); // value of i printf("j = %d \n", j); // value of j printf("*p = %d \n", p); // the address held by the pointer printf("&i = %d \n", &i); // address of i return 0; }

pointers to a function in c

#include <stdio.h>
#include <string.h>

void (*StartSd)(); // function pointer
void (*StopSd)();  // function pointer

void space()
{
    printf("\n");
}

void StopSound() // funtion
{
    printf("\nSound has Stopped");
}

void StartSound() // function
{
    printf("\nSound has Started");
}

void main()
{

    StartSd = StartSound; // Assign pointer to function
    StopSd = StopSound;   // Assign pointer to function

    (*StartSd)(); // Call the function with the pointer
    (*StopSd)();  // Call the Function with the pointer

    space();

    StartSd(); // Call the function with the pointer
    StopSd();  // Call the function with the pointer

    space();

    StartSound(); // Calling the function by name.
    StopSound();  // Calling the function by name.
}

Posted by: Guest on March-21-2022

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