C Language - Callback Function with Function Pointer

 

#include <stdio.h>

#include <stdlib.h>

int sum (int a, int b, int c)

{

return a+b*c;

} 

void greedGoodEvening (int (*fptr) (int, int, int)) 

{

printf ("Hello good evening dear user:\n");

printf ("The result of 20+19*2 is %d\n", fptr(20, 19, 2));

} 

void greedGoodAfternoon (int (*fptr) (int, int, int)) 

{ 

printf ("Hello good afternoon dear user:\n");

printf ("The result of 20+19*4 is %d\n", fptr(20, 19, 4));

} 

int main()

{ 

int (*ptr) (int, int, int);

ptr = &sum;

greedGoodEvening (ptr); 

greedGoodAfternoon (ptr); 

} 

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