C++第三次实验作业

</pre><pre name="code" class="cpp">#include<iostream>

using namespace std;

int main()
{
int year,month,day;
cout<<"欢迎试用傅氏日历!"<<endl;
cout<<"请输入年份和月份";
cin>>year>>month;
if( year%400==0 || (year%4==0 && year%100!=0))
{
switch(month)
{
case 2: day=29;break;
case 4:
case 6:
case 9:
case 11: day=30;break;
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: day=31;break; 

default : cout<<"Error"<<endl; 

} 

else

{ 

switch(month) 

                    { 

case 2: day=28;break; 

case 4: 

case 6: 

case 9: 

case 11: day=30;break;   

case 1: 

case 3: 

case 5: 

case 7: 

case 8: 

case 10: 

case 12: day=31;break; 

                     default : cout<<"Error"<<endl; 

               } 

}
cout<<"这一年的这个月有"<<day<<"天"<<endl; 

return 0;

}

#include <iostream>

using namespace std;

int main()
{
double m=0,r=0,t=0,i;
cout << "欢迎使用傅氏利息计算器!" << endl;
cout << "请输入存款金额：" ;
double money;
cin >>money;
cout << "======存款期限======" << endl;
cout << "1.三个月\n2.六个月\n3.一年\n4.两年\n5.三年\n6.五年\n";
cout<<"请输入代号：";
int n;
cin>>n;
switch(n)
{
case 1:t=0.25,r=0.031;break;
case 2:t=0.5,r=0.033;break;
case 3:t=1,r=0.035;break;
case 4:t=2,r=0.044;break;
case 5:t=3,r=0.05;break;
case 6:t=5,r=0.055;break;
}
i=money*r*t;
cout<<"到期利息为："<<i<<"元\n本息合计共："<<money+i<<"元"<<endl;
return 0;
}

#include <iostream>

#include <cmath>

using namespace std;

int main( )
{
double x,y;
cout << "请输入x的值：";
cin >> x;
if(x<2)
y=x;
else if(x<6)
y=x*x+1;
else if(x<10)
y=sqrt(x+1);
else if(x>=10)
y=1/(x+1);
cout << "y=" << y << endl;
return 0;
}