条件、循环、函数定义 练习
对前面的代码进行优化,用for,while,if,def实现:
- 画五角星
import turtle turtle.setup(600,400) for i in range(5): turtle.forward(150) turtle.left(144) done
- 画同心圆
import turtle turtle.setup(600,400) turtle.speed(10) for i in range(10): turtle.up() turtle.goto(0,-20*(i+1)) turtle.down() turtle.circle(20*(1+i)) done
- 画太阳花
import turtle turtle.setup(600,400) turtle.speed(10) turtle.bgcolor('purple') turtle.color('red','yellow') turtle.begin_fill() while True: turtle.forward(250) turtle.left(170) if(abs(turtle.pos()))<1: break turtle.end_fill() done
- 画五个角星
import turtle turtle.speed(10) turtle.setup(288,192) turtle.shape('turtle') turtle.setup(800,533) turtle.bgcolor('red') turtle.color('yellow') turtle.fillcolor('yellow') def my_goto(x,y): turtle.up() turtle.goto(x,y) turtle.down() def my_star(a): turtle.begin_fill() for i in range(5): turtle.forward(a) turtle.right(144) turtle.end_fill() def my_littlestar(b): turtle.begin_fill() for i in range(5): turtle.right(72) turtle.forward(b) turtle.right(144) turtle.end_fill() my_goto(-360,180) my_star(60) my_goto(-280,240) my_littlestar(20) my_goto(-240,200) my_littlestar(20) my_goto(-240,160) my_littlestar(20) my_goto(-280,120) my_littlestar(20) turtle.hideturtle()
e:画◇花瓣的太阳花
import turtle turtle.speed(10) turtle.bgcolor('black') turtle.fillcolor('white') turtle.begin_fill() for i in range(36): for j in range(2): turtle.forward(100) turtle.right(45) turtle.forward(100) turtle.right(135) turtle.right(10) turtle.right(90) turtle.forward(400) turtle.end_fill() done