#include <iostream>
void fun()
{
    using namespace std;
    cout << “please in put an intger: “<<endl;
    double x;
    cin >> x;
    cout << “please in put another intger: “<<endl;
    double y;
    cin >> y;

cout &lt;&lt; "please in put operater + - * /: "&lt;&lt;endl;
char ch;
cin &gt;&gt; ch;
if(ch == 43)
    cout &lt;&lt; "x + y is " &lt;&lt; x+y &lt;&lt; endl;
else if(ch == 45)
    cout &lt;&lt; "x - y is " &lt;&lt; x-y &lt;&lt; endl;
else if(ch == 42)
    cout &lt;&lt; "x * y is " &lt;&lt; x*y &lt;&lt; endl;
else if(ch == 47)
    cout &lt;&lt; "x / y is " &lt;&lt; x/y &lt;&lt; endl;
else
    cout &lt;&lt; "nothing ... " &lt;&lt;endl;

}