1.画填阴影线的任意多边形，阴影线间距，角度可调 2.多项式加减法 3.栈与队列（10进制转16进制，入栈，出栈，入队，出队，销毁队列，显示队列）-1. Draw the line polygon fill in the shadow, shadow line spacing, angle adjustable 2. Polynomial Addition and Subtraction 3. Stacks and queues (10 decimal 16 hex transfer,