SCANF_DEMO
  C version
  Show how scanf(format,address) is used to read data from the user.

Enter an integer value for int n:
Enter a real value for float x:
Enter a real value for double y:
Enter 1 character for char c:
Enter a string of 20 characters or less and NO INTERNAL SPACES:

  Here is what scanf() got for us:

  n = 1
  x = 2.200000
  y = 3.300000
  c = w
  s = Hello,

SCANF_DEMO
  Normal end of execution.