#include <iostream>  
using namespace std;  
int main()  
{  
    int type;  
    double dMoney,dPeriod,dRate,dInterest;  
    cout<<"歡迎使用利息計算器"<<endl;  
    cout<<"請輸入存款金額:";  
    cin>>dMoney;  
    cout<<"========存款期限======"<<endl;  
    cout<<"1.3個月"<<endl;  
        cout<<"2.6個月"<<endl;  
        cout<<"3.一年"<<endl;  
        cout<<"4.二年"<<endl;  
        cout<<"5.三年"<<endl;  
    cout<<"6.五年"<<endl;  
    cout<<"請輸入存款期限代號:";  
    cin>>type;  
    switch(type)  
    {  
    case 1:  
        dPeriod=0.25;  
        dRate=0.031;  
        break;  
    case 2:  
        dPeriod=0.5;  
        dRate=0.033;  
        break;  
    case 3:  
        dPeriod=1;  
        dRate=0.035;  
        break;  
    case 4:  
        dPeriod=2;  
        dRate=0.044;  
        break;  
    case 5:  
        dPeriod=3;  
        dRate=0.05;  
        break;  
    case 6:  
        dPeriod=5;  
        dRate=0.055;  
        break;  
    }  
    dInterest=dMoney*dPeriod*dRate;  
    cout<<"到期利息:"<<dInterest<<"元,本息合計:"<<dInterest+dMoney<<"元"<<endl;  
    cout<<"感謝您的使用，歡迎下次光臨!"<<endl;  
    return 0;  
}  
 

執行結果：