Chapter 3 Exercise 35
HEX.
(Decimal to hex) Write a program that prompts the user to enter an integer between 0 and 15 and displays its corresponding hex number.
INPUT and PROMPTS. The program prompts for a integer with: "Enter a decimal value (0 to 15): ".
OUTPUT . If the integer read in is equal to the value of a single hexadecimal digit (i.e. in the range specified by the prompt), the program prints out "The hex value is x", where x is the hexadecimal digit corresponding to the input; otherwise it prints the message "Invalid input".
CLASS NAMES. Your program class should be called He