C函数指针学习

#include <stdio.h>typedef int (*pFun)(int a,int b);int add(int a,int b){    return a+b;}int cout(pFun p,int a,int b,int c){    return (*p)(a,b)+c;}int sub(int ma,int mi){    return ma-mi;}int main(void){    pFun p=add;    printf("%d\n",cout(p,1,2,10));    p=sub;    printf("%d\n",cout(sub,10,5,10));    return 0;}