For each integer N from 1 to 100 compute and print the sum 1+2+...+N
Write a main() program that computes and prints N sums: 1, 1+2, 1+2+3, ... , 1+2+3+...+N.
There is a smart way to do this with just one loop,
and a not-so-smart way that uses nested loops.
Try to write the smart way from scratch.
