Guess the number is entered into the program from a random number generator in a computer.
Generated number should be in the range 0<X<1000.
A random number in the range 0<RND<1 where:
Enter the number of the users (variable 'No') and make comparisons and actions by:
a.) No<X ==> Asked to enter larger number (Message 1.)
b.) No>X ==> Asked to enter smaller number (Message 2.)
c.) No=X ==> Report the number hit by and greeting card (Message 3.)
d.) Request for re-operation of the program.