一.本月有几天
#include <iostream>
using namespace std;
int main()
{
int year,month,day;
cout<<"请您分别输入年份和月份:";
cin>>year>>month;
switch(month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
cout<<"本月天数为31天";break;
case 4:
case 6:
case 9:
case 11:cout<<"本月天数为30天";break;
case 2:{
if((year%4==0&&year%100!=0)||(year%400==0))
cout<<"本月天数为29天";
else
cout<<"本月天数为28天";
} break;
}
return 0;
}
二.定期存款利息计算器
#include <iostream>
using namespace std;
int main()
{
int money,number;
double year,s,m,n;
cout<<"欢迎使用利息计算器\n";
cout<<"请输入存款金额:";
cin>>money;
cout<<"请输入存款期限代号:\n1.三个月\n2.六个月\n3.一年\n4.两年\n5.三年\n6.五年\n";
cin>>number;
switch(number)
{
case 1:year=0.25;s=0.031;break;
case 2:year=0.5;s=0.033;break;
case 3:year=1;s=0.035;break;
case 4:year=2;s=0.044;break;
case 5:year=3;s=0.05;break;
case 6:year=5;s=0.055;break;
default:cout<<"不好意思,您的输入有误!\n";
}
m=money*s*year;
n=money+l;
cout << "到期利息为" <<m<<"本息合计共"<<n<< endl;
return 0;
}
三.多分数段函数的求值#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<<"输出y的值为:"<<y;
return 0;
}