Chapter 22, Problem 22.8E

(Packing Characters into Unsigned Integers) The left shift operator can be used to pack four-character values into a four-byte unsigned integer variable. Write a program that inputs characters from the keyboard and passes them to function packCharacters. To pack four characters into an unsigned integer variable, assign the first character to the unsigned variable, shift the unsigned variable left by eight-bit positions and combine the unsigned variable with the second character using the bitwise inclusive-OR operator, etc. The program should output the characters in their bit format before and after they’re packed into the unsigned integer to prove that they’re in fact packed correctly in the unsigned variable.