c++作业三

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这个月有几天

#include<iostream.h>    int main()  {        int year,month,day;     <pre name="code" class="cpp"> cout<<"欢迎试用日历!"<<endl;      cout<<"请输入年份";      cin>>year;      cout<<"请输入月份";      cin>>month;      switch(month)      {             case 1:<span style="font-family: Arial, Helvetica, sans-serif;"> day=31;break;</span>    case 2: <pre name="code" class="cpp">if( year%400==0 || (year%4==0 && year%100!=0))              day=29;          else day=28;breakcase 3: day=31;breakcase 4: day=30;break; case 5: day=31;break; case 6: day=30;break case 7: day=31;break; case 8: day=31;break; case 9: day=30;break case 10: day=31;break; case 11: day=30;break; case 12: day=31;break default : cout<<"Error"<<endl; } cout<<"这个月有"<<day<<"天"<<endl; return 0; }

利息计算

#include<iostream>  using namespace std;  int main()  {      cout<<"欢迎使用本计算器"<<endl;      cout<<"请输入金额：\0"<<" ";      int money,number;      double interest,rate,term,sum;       cin>>money;      cout<<"=======存款期限======="<<endl;      cout<<"1. 3个月\n2. 6个月\n3. 一年\n4. 两年\n5. 三年\n6. 五年"<<endl;      cout<<"请输入存款期限的代号："<<endl;      cin>>number;      switch(number)      {      case 1: term=0.25;rate=0.031;break;      case 2: term=0.50;rate=0.033;break;      case 3: term=1.00;rate=0.035;break;      case 4: term=2.00;rate=0.044;break;      case 5: term=3.00;rate=0.050;break;      case 6: term=5.00;rate=0.055;break;      default : cout<<"对不起，无此选项"<<endl;      }      interest=money*term*rate;      sum=money+interest;      cout<<"到期利息为："<<interest<<","<<"本息合计共："<<sum<<"元"<<endl;      cout<<"感谢您的使用，欢迎下次光临!"<<endl;      return 0;  }

分段函数

#include<iostream.h>  #include<cmath>    int main()  {      double x,y;      cout<<"请输入x"<<endl;      cin>>x;      if(x<2)  y=x;      else if(x<6)  y=x*x+1;      else if(x<10)  y=sqrt(x+1);      else y=1/(x+1);      cout<<"y为:"<<y<<endl;    }

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