#include <stdio.h> int sum(int x, int y) { return x + y; } int product(int x, int y) { return x * y; } int main() { int a = 13; int b = 5; int result = 0; int (*pfun)(int, int); pfun = sum; result = pfun(a, b); printf("\npfun = sum result = %d", result); pfun = product; result = pfun(a, b); printf("\npfun = product result = %d", result); }