User should be prompted to enter two non-negative numbers (say, a and b where a ≥ 0 and b ≥ 0) line by line and then press the "enter" key. Your program should calculate and display the following for these numbers (see sample output below):
sum(a+b)
differrence(a-b or b-a,whichever gives a positive output)
product(axb)
power(a,b)