print the decimal, octal and hexadecimal values of all character between the start and stop character entered by user, For example, if the user enters and 'a' and 'z', the program should print all the character between 'a' and 'z' and their respective numerical values.
make sure that the second character entered by the user occur later in the alphabet than the first character. If it does not, write a loop that repeatly asks the user for a valid second character until one is entered
i try this program, but something wrong with the loop function.