#include<iostream>
#include<iomanip>
using namespace std;

void main()
{
double leftoperand,rightoperand,result;
char operate;
cout<<"please input leftoperand operate rightoperand:"<<endl;
cin>>leftoperand>>operate>>rightoperand;
switch(operate)
{

case '+':


result=leftoperand+rightoperand;

break;

case '-':

result=leftoperand-rightoperand;

break;
case '*':
result=leftoperand*rightoperand;

break;
case '/':



if(rightoperand)

{result=leftoperand/rightoperand;

break;
}

else

{ cout<<"illegal operate input:"<<endl;
break;
}

}
cout<<leftoperand<<operate<<rightoperand<<"equals"<<result<<endl;





程序是正确的....只是我还有些疑问


如果我输入5+6回车 结果是:5+6equals11
可是如果我输入5空格+空格6回车 这样结果还是:5+6equals11
照理上面定义了operate是字符变量...应该把空格辅值给operate的啊!!!
求教!
}