Simple & Recursive Functions

PROGRAM 75: Write a program to print your name in a box using a function.
PROGRAM 76: Write a program to print the sum of three numbers.
PROGRAM 77: Write a program to read a number and find its square.
PROGRAM 78: Write a program to calculate the difference between two times using a function.
PROGRAM 79: Write a program to input a character. If this character is in uppercase then convert it into lowercase and vice versa.
PROGRAM 80: Write a program to draw rectangles of given width and length representing different rooms in a house.
PROGRAM 81: Write a program which reads a number and prints its factorial using recursion.
PROGRAM 82: Write a program to print the value of a number raised to power of another using recursion.