Simple function pointer in C

#include

int sum(int x, int y){

return x + y;

}

int product(int x, int y){

return x * y;

}

int difference(int x, int y){

return x - y;

}

int main(void){

int a = 10;

int b = 5;

int result = 0;

int (*pfun[3])(int, int); /* Function pointer array declaration */

/* Initialize pointers */

pfun[0] = sum;

pfun[1] = product;

pfun[2] = difference;

/* Call all three functions through pointers in an expression */

result = pfun[1](pfun[0](a, b), pfun[2](a, b));

printf("\n\nThe product of the sum and the difference = %d\n", result);

return 0;

}