#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <string>
using namespace std;
int main()
{
    string a;
    int first;
    int second;
    string answer;
    
    begin:
          system("title my first calculator");
    
    cout<<"multiply for multiplication"<<endl;
    cout<<"addme for addition"<<endl;   
    cout<<"divide for division"<<endl;
    cout<<"and subtract for subtraction: "<<endl;
    ": ";
    cin>>a;
    
    if(a !="addme")
    if(a !="subtract")
    if(a !="multiply")
    if(a !="divide")
    
    {
         cout<<"invalid command.."<<endl;
         goto name;
         }
    
    if(a == "divide")
    {
         cout<<"first number to be divided:  ";
         cin>> first;
         cout<<"second number to be dividied:  ";
         cin>>second;
         
         cout<<""<<first<<"/"<<second<<"="<<first/second<<"";
         }

    if(a == "addme")
    {
    cout<<"first number to be added"<<endl;
    cin>>first;
    cout<<"second number to be added"<<endl;
    cin>>second;
    
    cout<<""<<first<<"+"<<second<<"="<<first+second<<""<<endl;
}

if(a == "multiply")
{
cout<<"first number to be multiplied:  ";
cin>>first;
cout<<"second number to be multiplied:  ";
cin>>second;

cout<<""<<first<< "*" <<second<< "=" <<first*second<< ""<<endl;
}
if(a == "subtract")
{
cout<<"first number to be subtracted:   ";
cin>>first;
cout<<"second number to be subtracted:   ";
cin>>second;

cout<<""<<first<< "-" <<second<< "=" <<first-second<< ""<<endl;
}
name:
cout<<"for another calculation type new to exit type exit: ";
cin>>answer;
if(answer == "new")
{
          system("CLS");
          goto begin;
          }
if(answer == "exit")
{
          system("CLS");
          system("EXIT");
}

system("PAUSE");

}