Modify the above program to display the octal equivalent instead of the hexadecimal equivalent of the input number. Write a procedure to perform string reversal. The procedure reverse receives a...

Modify the above program to display the octal equivalent instead of the hexadecimal

equivalent of the input number.

Write a procedure to perform string reversal. The procedure reverse receives a

pointer to a character string (terminated by a NULL character) and reverses the string.

For example, if the original string is

slap

the reversed string should read

pals

The main procedure should request the string from the user. It should also display the

reversed string as output of the program.