设计一个应用程序，由用户从键盘输入两个数，然后对这两个数进行加、减、乘、除运算，并将结果显示除来

#include<stdio.h>

#include<iostream.h>
void main()
{ long result,firstNum,secondNum;
char operation,response;
do{
cout<<"Enter an operator(+,-,*,/):";
cin>>operation;
if(operation=='+'||operation=='-'
||operation=='*'||operation=='/')
{cout<<"Enter first Number:";
cin>>firstNum;
cout<<"Enter second Number:";
cin>>secondNum;
switch(operation)
{ case'+':result=firstNum+secondNum;break;
case'-':result=firstNum-secondNum;break;
case'*':result=firstNum*secondNum;break;
case'/':result=firstNum/secondNum;break;
}
cout<<"The result is "<<result<<endl;
}
else cout<<"Bad oprator\n";
cout<<"continue?(y/n)";
cin>>response;
}while(res