C/C++语言的函数指针

 C语言的一个函数指针示例

#include<stdio.h>
typedef int(*Calc)(int a, int b);
int Add(int a, int b)
{int result = a + b;return result;
}
int Sub(int a, int b)
{int result = a - b;return result;
}
int main()
{int x = 100;int y = 200;int z = 0;// 原本C语言的写法z = Add(x, y);printf(" % d + % d = % d\n", x, y, z);z = Sub(x, y);printf(" % d - % d = % d\n", x, y, z);// 改为新的形式Calc funcPoint1 = &Add;Calc funcPoint2 = &Sub;z = funcPoint1(x, y);printf(" % d + % d = % d\n", x, y, z);z = funcPoint2(x, y);printf(" % d - % d = % d\n", x, y, z);return 0;
}

输出样例：