利息计算器

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    #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;    
    }