switch语句

#include<iostream>

using namespace std;

int main ()

{
	int i;
	cout << "今天星期几：";
	cin >> i;

	switch(i)  // 输入几将后边的都输出出来，贯穿所有，除非将后边加上break; 就不会发生贯穿了，
	{
	case 1:    //case 后边必须是整数，case默认的判断就是等于，
		cout << "switch: 今天星期一。" << endl;
		break;
    case 2: 
		cout << "switch: 今天星期二。" << endl;
		break;
    case 3: 
		cout << "switch: 今天星期三。" << endl;
    case 4: 
		cout << "switch: 今天星期四。" << endl;
    case 5: 
		cout << "switch: 今天星期五。" << endl;
    case 6: 
		cout << "switch: 今天星期六。" << endl;
    case 7: 
		cout << "switch: 今天星期日。" << endl;
    default : 
		cout << "switch: 错误的输入。" << endl;


	}

/*	if(i==1)
		cout << "星期一" << endl;
	else if(i==2)
		cout << "星期二" << endl;
	else if(i==3)
		cout << "星期三" << endl;
	else if(i==4)
		cout << "星期四" << endl;
	else if(i==5)
		cout << "星期五" << endl;
	else if(i==6)
		cout << "星期六" << endl;
	else if(i==7)
		cout << "星期日" << endl;
	else
		cout << "错误的输入。" << endl;
*/
    return 0;
}