#include <iostream>
#include <cstdlib>

using namespace std;

int main(int argc, char *argv[])
{  system("chcp 1253");

	 int    invoper = 0;
	 char   oper;
     float  num1, num2, result;
	 cout<<"Δώσε δύο αριθμούς και μία πράξη με το ακόλουθο format\n";
	 cout<<" num1 oper num2\n";
	 cin>>num1>>oper>>num2;
	 if(oper == '*')
	    result = num1 * num2;
	 else if(oper == '/')
		 result = num1 / num2;
	      else if(oper == '+')
		      result = num1 + num2;
		   else if(oper == '-')
			   result = num1 - num2;
			else invoper = 1;
	 if( invoper != 1 )
	     cout<<num1<<oper<<num2<<"="<<result<<endl;
	 else cout<<"Invalid oper.\n";
                 
   system("PAUSE");
   return 0;
}