#include

using namespace std;

main()
{
double var1, var2;

cout cin >> var1;

cout cin >> var2;

cout cout cout cout cout

char op;

cin >> op;

cout

switch(op)
{
case '':
cout break;

case '-':
cout break;

case '/':
if(var1 > 0)
{
cout } else
{
cout }
break;

case '*':
cout break;

default:
cout

}

}