I have 2 questions:

1. How do I create a program that reads 2 digits up to 30 digits each, add these integers together, and display the result.

2. How do I write a program that computes the minimum number of coins and bills needed to make change for a purchase? The program will read in an input file that contains 2 numbers, the cost and the tendered amount. It will then calculate the change needed. For example, if the cost is $10.50 and the tendered amount is $20.00, the change will be 1 $5 bill, 4 $1 bills, and 2 quarters.

I'm not expecting code (although that won't hurt). I just need an idea of how to do these problems. Maybe even some pseudo code. Thanks.

Is this for homework or something?