#include "iostream.h"
int main()
{
float r,l;
const float pi=3.1415926f;
cout<<"请输入半径";
cin>>r;
l=2*pi*r;
cout<<"元的周长为"<<l<<endl;
return 0;
}
#include "iostream.h"
int main()
{
int a,b;
cin>>a>>b;
if (a<b)
{
int temp;
temp=b;b=a;a=temp;
}
cout<<a<<">"<<b;
return 0;
}
#include "iostream.h"
int main()
{
int a,b,max;
cin>>a>>b;
if (a>=b)
{
max=a;
}
else
{
max=b;
}
cout<<max<<endl;
return 0;
}
#include "iostream.h"
int main()
{
float a,b;
char oper;
cin>>a>>oper>>b;
if (oper=='+')
{
cout<<a<<oper<<b<<"="<<a+b<<endl;
}
else
{
if (oper=='-')
{
cout<<a<<oper<<b<<"="<<a-b<<endl;
}
else
{
if (oper=='*')
{
cout<<a<<oper<<b<<"="<<a*b<<endl;
}
else
{
if (oper=='/' && b!=0)
{
cout<<a<<oper<<b<<"="<<a/b<<endl;
}
else
{
cout<<"error"<<endl;
}
}
}
}
return 0;
}
#include "iostream.h"
int main()
{
float a,b;
char oper;
cout<<"请输入一个表达式"<<endl;
cin>>a>>oper>>b;
switch(oper)
{
case '+':
{
cout<<a<<oper<<b<<'='<<a+b<<endl;
break;
}
case'-':
{
cout<<a<<oper<<b<<'='<<a-b<<endl;
break;
}
case '*':
{
cout<<a<<oper<<b<<'='<<a*b<<endl;
break;
}
case '/':
{
if (b!=0)
cout<<a<<oper<<b<<'='<<a/b<<endl;
else
cout<<"出错啦！";
}
default:
cout<<"出错啦！";
}
return 0;
}
#include "iostream.h"
int main ()
{
int a,b,max;
cout<<"请输入两个数据"<<endl;
cin>>a>>b;
max=(a>=b)?a:b;
cout<<"较大的数是"<<max<<endl;
return 0;
}
第一天就学这么多 很简单的 所以就没有主题了
