#include <stdio.h>
#include <stdlib.h>
typedef int (*callback) (int a,int b);
int sum (int X,int Y){
printf("%d\n", X+Y);
}
int sub(int X,int Y){
printf("%d\n", X-Y);
}
int show (int a,int b,callback p){
p(a,b);
}
int main ()
{
show(6,6,sum);
show(6,6,sub);
}
运行结果: