#include<iostream>

using namespace std



class ABC

{

private:

double i,j

public:

ABC(int x,int y):i(x),j(y)

{}

ABC()

{}

double add()

{

return i+j

}

double jian()

{

return i-j

}

double cheng()

{

return i*j

}

double div()

{

return i/j

}



}



void main()

{



int m,n

char op

cout<<\"input\"

cin>>m>>op>>n

ABC a(m,n)

switch(op)

{

case + :cout<<a.add() break

case - :cout<<a.jian() break

case * :cout<<a.cheng() break

case / :cout<<a.div() break

default:cout<<\"error\"

}

cout<<endl

}

-# include