条件、循环、函数定义 练习
一、对前面的代码进行优化,用for,while,if,def实现:
1.画五角星
import turtle turtle.setup(600,400,0,0) turtle.color('yellow') turtle.bgcolor('red') turtle.fillcolor('yellow') def mygoto(x,y): turtle.up() turtle.goto(x,y) turtle.down() mygoto(-250,75) turtle.begin_fill() for i in range(5): turtle.forward(100) turtle.right(144) turtle.end_fill()
2.画同心圆
import turtle turtle.shape('turtle') for i in range(5): turtle.up() turtle.goto(0,-20*(i+1)) turtle.down() turtle.circle(20*(i+1)) turtle.write(10-i)
3.画太阳花
import turtle turtle.bgcolor('white') turtle.color('green') turtle.fillcolor('yellow') turtle.begin_fill() while True: turtle.forward(200) turtle.left(150) if(abs(turtle.pos()))<1: break turtle.end_fill() done()
4.画五个角星
import turtle turtle.setup(600,400,0,0) turtle.color('yellow') turtle.bgcolor('red') turtle.fillcolor('yellow') def mygoto(x,y): turtle.up() turtle.goto(x,y) turtle.down() mygoto(-250,75) turtle.begin_fill() for i in range(5): turtle.forward(100) turtle.right(144) turtle.end_fill() mygoto(-130,150) turtle.begin_fill() for i in range(5): turtle.forward(40) turtle.right(144) turtle.end_fill() mygoto(-70,110) turtle.begin_fill() for i in range(5): turtle.forward(40) turtle.right(144) turtle.end_fill() mygoto(-80,35) turtle.begin_fill() for i in range(5): turtle.forward(40) turtle.right(144) turtle.end_fill() mygoto(-130,-25) turtle.begin_fill() for i in range(5): turtle.forward(40) turtle.right(144) turtle.end_fill()