第一章1（1.11——1.21）

最新推荐文章于 2025-12-08 12:04:40 发布

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#python

本文探讨了基于出生率、死亡率和移民率的人口增长模型，并使用Python的Turtle库绘制了各种几何图形，包括正方形、十字、三角形、两个三角形、四个圆、直线、五角星、多边形、立方体和时钟。

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import turtle

# 1.11
birth_t = 7
dead_t = 13
migrant_t = 45
people_num = 3120324986
birth = 365 * 24 * 60 * 60 // birth_t
dead = 365 * 24 * 60 * 60 // dead_t
migrant = 365 * 24 * 60 * 60 // migrant_t
for i in range(5):
    print('第{}年的人口为：{}'.format(i + 1, people_num + (birth - dead + migrant) * (i + 1)))


# 1.22 绘制正方形
def draw_square():
    turtle.right(90)
    turtle.forward(100)
    turtle.right(90)
    turtle.forward(100)
    for i in range(3):
        turtle.right(90)
        turtle.forward(200)
    turtle.right(90)
    turtle.forward(100)
    turtle.penup()
    turtle.goto(100, 0)
    turtle.pendown()
    turtle.forward(200)
    turtle.penup()
    turtle.goto(0, 100)
    turtle.pendown()
    turtle.left(90)
    turtle.forward(100)
    turtle.done()


# 1.13 绘制十字
def draw_cross():
    turtle.penup()
    turtle.goto(-100, 0)
    turtle.pendown()
    turtle.forward(200)
    turtle.right(90)
    turtle.penup()
    turtle.goto(0, 100)
    turtle.pendown()
    turtle.forward(200)
    turtle.done()


# 1.14 绘制三角形
def draw_triangle():
    turtle.right(60)
    turtle.forward(100)
    for i in range(2):
        turtle.right(120)
        turtle.forward(100)
    turtle.done()


# 1.15 绘制两个三角形
def draw_two_triangles():
    turtle.right(60)
    turtle.forward(100)
    for i in range(2):
        turtle.right(120)
        turtle.forward(100)
    turtle.forward(100)
    for i in range(2):
        turtle.left(120)
        turtle.forward(100)
    turtle.done()


# 1.16 绘制四个圆
def draw_four_circles():
    turtle.penup()
    turtle.goto(-100, 0)
    turtle.pendown()
    turtle.circle(100)
    turtle.circle(-100)
    turtle.penup()
    turtle.goto(100, 0)
    turtle.pendown()
    turtle.circle(100)
    turtle.circle(-100)
    turtle.done()


# 1.17 绘制直线
def draw_line():
    turtle.penup()
    turtle.goto(50, -50)
    turtle.pendown()
    turtle.color('red')
    turtle.goto(-39, 48)
    turtle.hideturtle()
    turtle.done()


# draw_line()
# 1.18 绘制五角星
def draw_pentacle():
    turtle.right(72)
    turtle.forward(200)
    for i in range(4):
        turtle.right(144)
        turtle.forward(200)
    turtle.done()


# draw_pentacle()
# 1.19 绘制多边形
def draw_polygon():
    turtle.penup()
    turtle.goto(40, -69.28)
    turtle.pendown()
    turtle.goto(-40, -69.28)
    turtle.goto(-80, -9.8)
    turtle.goto(-40, 69)
    turtle.goto(40, 69)
    turtle.goto(80, 0)
    turtle.goto(40, -69.28)
    turtle.done()


# draw_polygon()


# 1.20 显示立方体
def show_cube():
    def draw_rectangle():
        for i in range(2):
            turtle.forward(200)
            turtle.right(90)
            turtle.forward(100)
            turtle.right(90)

    draw_rectangle()
    turtle.penup()
    turtle.goto(20, 40)
    turtle.pendown()
    draw_rectangle()
    turtle.goto(0, 0)
    turtle.penup()
    turtle.goto(20, -60)
    turtle.pendown()
    turtle.goto(0, -100)
    turtle.penup()
    turtle.goto(220, 40)
    turtle.pendown()
    turtle.goto(200, 0)
    turtle.penup()
    turtle.goto(220, -60)
    turtle.pendown()
    turtle.goto(200, -100)

    turtle.done()


# show_cube()
# 1.21 显示时钟
def show_clock():
    turtle.forward(150)
    turtle.penup()
    turtle.goto(0, -200)
    turtle.pendown()
    turtle.write('6')
    turtle.circle(200)
    turtle.penup()
    turtle.goto(0, 200)
    turtle.pendown()
    turtle.write('12')
    turtle.penup()
    turtle.goto(200, 0)
    turtle.pendown()
    turtle.write('3')
    turtle.penup()
    turtle.goto(-200, 0)
    turtle.pendown()
    turtle.write('9')
    turtle.penup()
    turtle.goto(0, 0)
    turtle.pendown()
    turtle.left(172.5)
    turtle.forward(100)
    turtle.done()


# show_clock()