c++作业3

#include<iostream>using namespace std;int main(){int x,y,d;cin>>y>>x;cout<<"输入年份月份"<<endl;if(x==1||x==3||x==5||x==7||x==8||x==10||x==12)d=31;if(x==4||x==6||x==9||x==11)d=30;if(y%400==0||y%4==0&&y%100!=0){if(x==2)d=29;elsed=28;}cout<<"天数为"<<endl;return 0;}

二

#include<iostream>using namespace std;int main(){cout<<"欢迎使用利息计算器"<<endl;int x,y,z,t;cout<<"请输入存款金额"<<endl;cin>>x;cout<<"存款金额"<<endl;cout<<"1.3个月"<<endl;cout<<"2.6个月"<<endl;cout<<"3.一年"<<endl;cout<<"4.二年"<<endl;cout<<"5.三年"<<endl;cout<<"6.五年"<<endl;cout<<"请输入存款期限代号"<<endl;cin>>t;cout<<"到期利息为";switch(t){case 1:y=x*0.031*0.25,cout<<y;break;case 2:y=x*0.033*0.5,cout<<y;break;case 3:y=x*0.035*1,cout<<y;break;case 4:y=x*0.044*2,cout<<y;break;case 5:y=x*0.05*3,cout<<y;break;case 6:y=x*0.055*5,cout<<y;break;default:cout<<"错误存款代号";break;}z=x+y;cout<<"本息合计"<<z<<endl;cout<<"感谢使用，欢迎下次光临"<<endl;return 0;}

#include<iostream>#include<cmath>using namespace std;int main(){double x,y,z;cin>>x;{if(x<2)y=x;else if(x<6&&x>=2)y=x*x+1;else if(x<10&&x>=6)y=sqrt(x+1);else(x>=10);y=1/(x+1);}cout<<y<<endl;return 0;}

结果