题目：画图，学用rectangle画方形。　　　 ___________________________________________________________________ 　 程序分析：利用for循环控制100-999个数，每个数分解出个位，十位，百位。 -Topic: drawing, painting theory and rectangle square. _______________________________

题目：画图，学用line画直线。直线很重要-Topic: drawing, line theory and draw a line. Line is very important