Hi
I am C++ programmer and in C++ I used some thing that I want
corresponding those things in Ruby.
please help me.

1 - In C++ , I can write this program but in Ruby I can't:
  int i,x;
  int sum=0;
  for( x=0 ; x <= 50 ; x++ ) {
      cin >> i;
      sum = sum + ( x + i ) ;
  }
  cout << sum;



2 - int a,b,c,d;
    while( 1 ) {
       cin >> a >> b >> c >>d ;
       if( a < 0 || b < 0 )
          break;
       cout << a << " " << b << " " << c << " " << d << endl;
    }


thanks.

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