第二课 前进100：pen.fd(100); 后退100：pen.bk(100); 左转90度：pen.lt(90); 右转90度：pen.rt(90); int main() { pen.show(); pen.speed(6); pen.fd(60); pen.rt(90); pen.fd(20); pen.rt(90); pen.fd(20); pen.rt(90); pen.fd(20); return 0; } 40 前进100：pen.fd(100); 后退100：pen.bk(100); 左转90度：pen.lt(90); 右转90度：pen.rt(90); int main() { pen.show(); pen.speed(6); pen.fd(60); pen.lt(90); pen.fd(40); return 0; } 20 40 60 30 30 int main() { pen.show(); pen.speed(6); pen.fd(60); pen.bk(30); pen.lt(90); pen.fd(30); pen.bk(60); return 0; } 30 int main() { pen.show(); pen.speed(6); pen.lt(90); pen.fd(30); pen.rt(90); pen.fd(30); pen.rt(90); pen.fd(30); pen.lt(90); pen.fd(30); pen.lt(90); pen.fd(30); return 0; } 本文来源：https://www.wddqw.com/doc/0ec84c04b8f3f90f76c66137ee06eff9aff849cb.html