c++第三次实验

本月有几天

using namespace std;
int main()
{
int a,b,c;
cout<<"输入年份";
cin>>a;
cout<<"输入月份";
cin>>b;
switch(b)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: c=31;break;
case 4:
case 6:
case 9:
case 11: c=30;break;
case 2:
if( a%400==0 || (a%4==0 && a%100!=0))
c=29;
else c=28;break;
}
cout<<"该月有"<<c<<endl;
return 0;
}

<img src="http://img.blog.csdn.net/20160411214810881?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

<span style="color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15px; line-height: 35px;">二、定期存款利息计算器</span>

#include<iostream>    
using namespace std;    
int main()    
{    
        int x,r;  
    double d,s,g,h;  
        cout<<"欢迎使用利息计算器!"<<endl;    
    cout<<"请输入存款金额:";    
    cin>>x;     
        cout<<"======存款期限======"<<endl;  
    cout<<"1、3个月\n2、6个月\n3、一年\n4、二年\n5、三年\n6、五年\n"<<endl;  
    cout<<"请输入存款期限的代号:";  
    cin>>r;  
    switch(r)  
    {  
    case 1:d=0.25;s=0.0310;break;  
    case 2:d=0.50;s=0.0330;break;  
    case 3:d=1.00;s=0.0350;break;  
    case 4:d=2.00;s=0.0440;break;  
    case 5:d=3.00;s=0.0500;break;  
    case 6:d=5.00;s=0.0550;break;  
    }  
    g=x*d*s;  
    h=g+x;  
    cout<<"到期利息为："<<g<<"本息合计共"<<h<<endl;  
    cout<<"感谢您的使用，欢迎下次光临!"<<endl;  
    return 0;    
}  

<img src="http://img.blog.csdn.net/20160411215139214?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />