Improvement for the INPUT command

[compsystems]

Hello, if the INPUT command only contains a variable, when entering the data must be kept on the screen, a second [enter] executes and exits the dialog box, otherwise I can not edit it, If I enter it wrongly

Test example

PHP Code:

export x:=0;
export y:=0;
export z:=0;
export input1var()
BEGIN
  //x:=5;
  print();
  print("input cmd with a variable"); wait;
  input( x );
  print("foo1"); wait;
  foo1();
  input( y );
  print("foo2"); wait;
  foo2();
  input( z );
  print("foo3"); wait;
  foo3();
  return "Done";
END;