#include<stdio.h> void main() { int sum(int, int); int (*p)(int,int); int a,b,r; clrscr(); printf("input the two integers:\n"); scanf("%d%d",&a,&b); p=sum; r=(*p)(a,b); printf("the sum of %4d and %4d is :%5d",a,b,r); getch(); } int sum(int m, int n) { return(m+n); }

Output: input the two integers: 100 150 the sum of 100 and 150 is : 250