求平方

问题：

Write a program that point the squares of  the natural number 0,1,...,n.

解答：

1.

 

 k=0while not (k>n): print k*k k=k+1

2.(n-1)²=n²-2n+1则n²=(n-1)²+2n-1

k=0while not (k>n): k=k+1 square = square+k+k-1