用C语言实现键盘画图,"V”:画笔提起 "W”:开始画图 "R”:开始擦图 "S”:当前图形存入文件 "E”:调出已有文件 "C”:画圆-C language keyboard drawing, the "V" : brush name "W" : start drawing "R" : start rubbing map "S" : The current graphics into documents "E" : the redeployment of existing files "C" : Circle