第三次C++作业

一、本月有几天

#include <iostream>
using namespace std;
void main()
{
int year,month;
cout<<"请输入年份及月份:";
cin>>year>>month;
if(year%4==0&&year%100!=0||year%400==0)
switch(month)
{
case'1':cout<<"本月有31天";
break;
case'2':cout<<"本月有29天";
break;
case'3':cout<<"本月有31天";
break;
case'4':cout<<"本月有30天";
break;
case'5':cout<<"本月有31天";
break;
case'6':cout<<"本月有30天";
break;
case'7':cout<<"本月有31天";
break;
case'8':cout<<"本月有31天";
break;
case'9':cout<<"本月有30天";
break;
case'10':cout<<"本月有31天";
break;
case'11':cout<<"本月有30天";
break;
case'12':cout<<"本月有31天";
break;
}
else
switch(month)
{
case'1':cout<<"本月有31天";
break;
case'2':cout<<"本月有28天";
break;
case'3':cout<<"本月有31天";
break;
case'4':cout<<"本月有30天";
break;
case'5':cout<<"本月有31天";
break;
case'6':cout<<"本月有30天";
break;
case'7':cout<<"本月有31天";
break;
case'8':cout<<"本月有31天";
break;
case'9':cout<<"本月有30天";
break;
case'10':cout<<"本月有31天";
break;
case'11':cout<<"本月有30天";
break;
case'12':cout<<"本月有31天";
break;
}
return 0;
}

二、

#include <iostream>
using namespace std;
void main()
{
double money,x,y,n;
cout<<"欢迎使用利息计算器！"<<endl;
cout<<"请输入存款金额"<<endl;
cin>>money;
cout<<"======存款期限======"<<'\n'<<"1、3个月"<<'\n'<<"2、6个月"<<'\n'<<"3、一年"<<'\n'<<"4、两年"<<'\n'<<"5、三年"<<'\n'<<"6、六年"<<endl;
cout<<"请输入存款期限代号；";
int q;
cin>>q;
switch(q)
{
case'1':y=0.25,n=0.013;
break;
case'2':y=0.5,n=0.033;
break;
case'3':y=1,n=0.035;
break;
case'4':y=2,n=0.044;
break;
case'5':y=3,n=0.05;
break;
case'1':y=6,n=0.055;
break;
default:cout<<"输入错误"<<endl;
}
x=money*y*n;
cout<<"到期利息为"<<x<<"元，共计"<<money+x<<"元"<<endl;
return 0;
}

#include <iostream>
using namespace std;
void main()
{
double dSalary ,dtax,taxrate,deduction,a;
cout<<"请输入您的月收入"<<endl;
cin>>dSalary;
if(dSalary<=3500)
{
cout<<"本月无需纳税"<<endl;
cout<<"收入为："<<dSalary<<endl;
}
else
{
a=dSalary-3500;
if(a>=0&&a<1500)
{
deduction=0;taxrate=0.03;
}
else if(a>=1500&&a<4500)
{
deduction=105;taxrate=0.1;
}
else if(a>=4500&&a<9000)
{
deduction=555;taxrate=0.2;
}
else if(a>=9000&&a<35000)
{
deduction=1005;taxrate=0.25;
}
else if(a>=35000&&a<=55000)
{
deduction=2755;taxrate=0.3;
}
else if(a>=55000&&a<80000)
{
deduction=13505;taxrate=0.45;
}

}
dtax=dSalary*taxrate-deduction;
dSalary=dSalary-dtax;
cout<<"本月您应缴个人所得税为："<<dtax<<endl;
cout<<"本月您的税后收入为："<<dSalary<<endl;

return 0;
}