C++第9周项目3参考——利息计算器

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【项目3：利息计算器】输入存款金额并选择存款种类，计算出利息（不计利息税）和本息合计。要求使用switch语句，根据选择的存款种类，确定利率和存期后计算。

可参考http://www.bankrate.com.cn/tools/saving-interest-calculator.html中的完整的在线利息计算器，并在此基础上改造。

#include<iostream>
using namespace std; 
int main()  
{  
	int  type, days;  
	double money, period, rate, interest;  
	cout << "欢迎使用利息计算器！"<<endl;
	cout << "请输入存款金额：";  
	cin >> money;  
	cout << "======存款期限======" << endl;  
	cout << "1. 活期存款" << endl;
	cout << "2. 3个月 " << endl;
	cout << "3. 6个月" << endl;
	cout << "4. 一年 " << endl;
	cout << "5. 二年" << endl;
	cout << "6. 三年" << endl;
	cout << "7. 五年" << endl;
	cout << "请输入存款期限的代号：";
	cin >> type;
	if (type>=1 && type <=7)
	{
		switch(type)　　//在if中嵌入了switch分情况处理
		{
		case 1: 
			cout<<"请输入存款天数：";
			cin >> days;
			period = days/360.0;
			rate = 0.005;
			break;
		case 2:
			period = 0.25;
			rate = 0.031;
			break;
		case 3:
			period = 0.5;
			rate = 0.033;
			break;
		case 4:
			period = 1;
			rate = 0.035;
			break;
		case 5:
			period = 2;
			rate = 0.044;
			break;
		case 6:
			period = 3;
			rate = 0.05;
			break;
		case 7:
			period = 5;
			rate = 0.055;
			break;		
		}
		interest = money * period * rate;
		cout << "到期利息为：" << interest << "元，本息合计共"<< interest + money <<"元。"<<endl;  
	}
	else
		cout << "选择存款类型错误！"<<endl;
	cout << "感谢您的使用，欢迎下次光临！"<<endl;  
	return 0;  
}