#include <stdio.h> #include <stdlib.h> void mean(int a,int b, int *ptr_to_answer) { *ptr_to_answer = (a + b)/2; } int main() { int i, j; int answer; i = 6; j = 9; mean(i,j, &answer); /* passing a pointer to 'answer' */ printf(" The mean of %d and %d = %d\n", i, j, answer); }