c++作业3

来源：互联网发布：windows snmp 编辑：程序博客网时间：2024/05/23 00:03

一、利息计算器

#include <iostream>using namespace std;int main(){double m,a,b,c,d,e,f;int t;cout<<"欢迎使用利息计算器！\n"<<"请输入您要存款金额：";cin>>m;a=m*0.031*0.25,b=m*0.033*0.5,c=m*0.035*1,d=m*0.044*2,e=m*0.050*3,f=m*0.055*5;cout<<"======存款期限======\n";cout<<"1、三个月  2、六个月  3、一年  4、二年  5、三年  6、五年\n"<<"请选择存款期限前的代号：";cin>>t;switch(t){case 1:cout<<"到期利息为："<<a<<"，"<<"本息合计共："<<a+m<<"\n";break;case 2:cout<<"到期利息为："<<b<<"，"<<"本息合计共："<<b+m<<"\n";break;case 3:cout<<"到期利息为："<<c<<"，"<<"本息合计共："<<c+m<<"\n";break;case 4:cout<<"到期利息为："<<d<<"，"<<"本息合计共："<<d+m<<"\n";break;case 5:cout<<"到期利息为："<<e<<"，"<<"本息合计共："<<e+m<<"\n";break;case 6:cout<<"到期利息为："<<f<<"，"<<"本息合计共："<<f+m<<"\n";break;default:cout<<"error\n";break;}return 0;}

二、多分段函数求值

#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);elsey=1/(x+1);cout<<"y="<<y<<endl;return 0;}

三、本月的天数

#include <iostream>using namespace std;int main(){int year,month;cout<<"请依次输入您需要查询的年份和月份（中间用空格键分开）：";cin>>year>>month;cout<<"本月天数为：";if(year%4==0&&year%100!=0||year%400==0){switch(month){case 1:cout<<"31\n";break;case 2:cout<<"29\n";break;case 3:cout<<"31\n";break;case 4:cout<<"30\n";break;case 5:cout<<"31\n";break;case 6:cout<<"30\n";break;case 7:cout<<"31\n";break;case 8:cout<<"31\n";break;case 9:cout<<"30\n";break;case 10:cout<<"31\n";break;case 11:cout<<"30\n";break;case 12:cout<<"31\n";break;default:cout<<"error\n";break;}}else{switch(month){case 1:cout<<"31\n";break;case 2:cout<<"28\n";break;case 3:cout<<"31\n";break;case 4:cout<<"30\n";break;case 5:cout<<"31\n";break;case 6:cout<<"30\n";break;case 7:cout<<"31\n";break;case 8:cout<<"31\n";break;case 9:cout<<"30\n";break;case 10:cout<<"31\n";break;case 11:cout<<"30\n";break;case 12:cout<<"31\n";break;default:cout<<"error\n";break;}}return 0;}

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