#include <iostream.h>
void main ()
{
int x;
cout<<"请输入数字1~7其中的一个数"<<endl;
cin>>x;
if(x==1)
cout<<"monday或星期一"<<endl;
else
if(x==2)
cout<<"tuesday或星期一"<<endl;
else
if(x==3)
cout<<"wednesday或星期三"<<endl;
else
if(x==4)
cout<<"thursday或星期四"<<endl;
else
if(x==5)
cout<<"friday或星期五"<<endl;
else
if(x==6)
cout<<"saturday或星期六"<<endl;
else
cout<<"sunday或星期日"<<endl;
}
　　　--说着，我脱下了楼主的胖次

#include<iostream.h>
void main()
{
char x,m,f;
double kg,cm;
cout<<"请输入性别，身高"<<endl;
x=m,f;
cin>>x;
cin>>cm;
if(x=='f')
kg=cm-105;
else
kg=cm-100;
cout<<"kg="<<kg<<endl;
}
　　　--说着，我脱下了楼主的胖次

#include <iostream.h>
void main()
{
char n;
double x,y;
cout<<"请输入x,n,y:";
cin>>x;
cin>>n;
cin>>y;
if (n!='+' && n!='-' && n!='*' && n!='/')
cout<<"无效的算数操作符，无法计算"<<endl;
else
if (n=='/' && y==0)
cout<<"无效的算数操作符，无法计算"<<endl;
else
if (n=='+')
cout<<"x+y="<<x+y<<endl;
else
if (n=='-')
cout<<"x-y="<<x-y<<endl;
else
if (n=='*')
cout<<"x*y="<<x*y<<endl;
else
cout<<"x/y="<<x/y<<endl;
}
　　　--说着，我脱下了楼主的胖次