在C/C++中，switch语句是经常被用到的，当switch内的case语句较多时程序有时显得比较繁乱，此种情况下可以用另外一种实现方式替代switch。详细用法见例子：

#include "stdafx.h"

float AddFunc(float a, float b)
{
	return (a + b);
}

float SubFunc(float a, float b)
{
	return (a - b);
}

float MultiplyFunc(float a, float b)
{
	return (a * b);
}

float DivisionFunc(float a, float b)
{
	return (a / b);
}

void Fun1(float a, float b, int flag, float &result)
{
	switch (flag)
	{
	case 0:
		result = AddFunc(a, b);
		break;
	case 1:
		result = SubFunc(a, b);
		break;
	case 2:
		result = MultiplyFunc(a, b);
		break;
	case 3:
		result = DivisionFunc(a, b);
		break;
	}
}

//若函数无参数，且返回值为空，则应该这样定义：
//typedef void (*BasicOperationsFunc)();
typedef float (*BasicOperationsFunc)(float a, float b);
BasicOperationsFunc g_BasicOperationsFunc[] = {
	&AddFunc,
	&SubFunc,
	&MultiplyFunc,
	&DivisionFunc
};

void Fun2(float a, float b, int flag, float &result)
{
	BasicOperationsFunc  basicOperationFunc = g_BasicOperationsFunc[flag];
	if (!basicOperationFunc) return;
	result = basicOperationFunc(a, b);
}

int _tmain(int argc, _TCHAR* argv[])
{
	float a = 10, b = 2;
	float result1 = 0, result2 = 0;
	int flag = 1;

	Fun1(a, b, flag, result1);
	Fun2(a, b, flag, result2);

	return 0;
}

还有其它推荐的方法吗？

C/C++中switch用法的一种替换方式