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：