《Python语言程序设计》第一章.练习与作业

Python语言程序设计封面.jpeg

编程题 1.1

print("Welcome to Python")
print("Welcome to Computer Science")
print("Programming is fun")

编程题 1.2

for i in range(5):
    print('Welcome to Python')

编程题 1.3

# 本题不严谨，无法严肃对齐
print("F" * 7, " " * 3, "U", " " * 5, "U", " " * 3, "N" * 2, " " * 4, "N" * 2)
print(    "F" * 2,    " " * 4,    " " * 3,    "U",    " " * 5,    "U",    " " * 3,    "N" * 3,    " " * 3,    "N" * 2)
print(    "F" * 7,    " " * 3,    "U",    " " * 5,    "U",    " " * 3,    "N" * 2,    "",    "N" * 1,    " " * 1,    "N" * 2)
print(    "F" * 2,    " " * 4,    " " * 3,    "",    "U",    " " * 3,    "U",    " " * 4,    "N" * 2,    " " * 2,    "N",    "N" * 2)
print(    "F" * 2,    " " * 4,    " " * 5,    "" * 3,    "U" * 3,    " " * 2,    " " * 3,    "N" * 2,    " " * 3,    "N" * 3)

编程题 1.4

i = 1
print('a', ' ' * 3, 'a^2', ' ' * 3, 'a^3')
print(i * 1, ' ' * 3, i * 1**2, ' ' * 5, i * 1**3)
print(i * 2, ' ' * 3, i * 2**2, ' ' * 5, i * 2**3)
print(i * 3, ' ' * 3, i * 3**2, ' ' * 5, i * 3**3)
print(i * 4, ' ' * 3, i * 4**2, ' ' * 4, i * 4**3)

编程题 1.5

# 1.5
a = 9.5 * 4.5
b = 2.5 * 3
c = 45.5 - 3.5
print((a - b) / c)

编程题 1.6

sum = 0
for i in range(1, 10):       # range(start,stop,step=None)
    sum = sum + i
print(sum)

编程题 1.7

max = 11            # max为分子项中的最大数
sum = 0
i = 0
for i in range(1 + max // 2):
    sum = sum + 4 * 1 * ((-1)**i) / (1 + i * 2)
    i = i + 1
print(sum)

编程题 1.8

r = 5.5
PI = 3.14                   # 常量建议用大写表示
area = PI * (r**2)          # 计算面积
perimeter = 2 * PI * r      # 计算周长
print('area=', area)
print('perimeter=', perimeter)

编程题 1.9

width = 4.5
height = 7.9
area = width * height                   # 计算面积
perimeter = width * 2 + height * 2      # 计算周长
print(area)
print(perimeter)

编程题 1.10

total_mileage = 14 * 1.6
time = 45.3 / 60
speed = total_mileage / time
print('speed:', speed, 'miles/hour')

编程题 1.11

born_one_year = 365 * (24 * 3600 // 7)           # 每年出生人口
dead_one_year = 365 * (24 * 3600 // 13)          # 每年死亡人口
immigration = 365 * (24 * 3600 // 45)            # 每年移民人口
Now_population = 3120324986                      # 当前人口

i = 1
for i in range(5):
    Total_population = Now_population + i * \
        (born_one_year - dead_one_year + immigration)           # Pycharm中自动换行，以 \ 表示
    i = i + 1
    print('接下来第{}年，人口是{}人。'.format(i, Total_population))

编程题 1.12

# 1.12，图 1-18a，绘制正方形
import turtle

turtle.setup(500, 500)       # 设置窗口尺寸

turtle.penup()
turtle.goto(100, 100)
turtle.pendown()

for i in range(4):
    turtle.right(90)
    turtle.fd(200)

turtle.penup()
turtle.goto(-100, 0)
turtle.pendown()
turtle.fd(200)

turtle.penup()
turtle.goto(0, -100)
turtle.pendown()
turtle.right(-90)
turtle.fd(100)

turtle.penup()
turtle.goto(0, 100)
turtle.pendown()
turtle.right(180)
turtle.fd(100)

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()               # 运行结束不退出 turtle 绘图窗口

编程题 1.13

# 1.13，图 1-18b，绘制十字
import turtle

turtle.setup(500, 500)  # 设置窗口尺寸

turtle.penup()
turtle.goto(-100, 0)
turtle.pendown()
turtle.fd(200)

turtle.penup()
turtle.goto(0, 100)
turtle.pendown()
turtle.right(90)
turtle.fd(200)

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()               # 运行结束不退出 turtle 绘图窗口

编程题 1.14

# 1.14，图 1-18c，绘制三角形 1
import turtle

turtle.setup(500, 500)  # 设置窗口尺寸

turtle.right(60)
turtle.fd(200)

turtle.right(120)
turtle.fd(200)

turtle.right(120)
turtle.fd(200)

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()  # 运行结束不退出 turtle 绘图窗口

编程题 1.14-2

# 1.14，图 1-18c，绘制三角形 2
import turtle

turtle.setup(500, 500)       # 设置窗口尺寸
turtle.circle(-100, 360, 3)

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()               # 运行结束不退出 turtle 绘图窗口

编程题 1.15

# 1.15，图 1-18d，绘制两个三角形
import turtle

turtle.setup(500, 500)  # 设置窗口尺寸

turtle.right(60)        # 绘制下方三角形
turtle.fd(200)

turtle.right(120)
turtle.fd(200)

turtle.right(120)
turtle.fd(200)

turtle.fd(200)          # 绘制上方三角形

turtle.right(-120)
turtle.fd(200)

turtle.right(-120)
turtle.fd(200)

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()  # 运行结束不退出 turtle 绘图窗口

编程题 1.16

# 1.16，图 1-19a，绘制四个圆
import turtle

turtle.setup(500, 500)  # 设置窗口尺寸

turtle.penup()          # 第一象限，圈1
turtle.goto(30, 30)
turtle.pendown()
turtle.circle(30)

turtle.penup()          # 第二象限，圈2
turtle.goto(-30, 30)
turtle.pendown()
turtle.circle(30)

turtle.penup()          # 第三象限，圈3
turtle.goto(-30, -30)
turtle.pendown()
turtle.circle(30)

turtle.penup()          # 第四象限，圈4
turtle.goto(30, -30)
turtle.pendown()
turtle.circle(30)

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()

编程题 1.17

# 1.17，图 1-19b，绘制直线
import turtle

turtle.setup(500, 500)  # 设置窗口尺寸
turtle.speed(1)

turtle.penup()
turtle.goto(-39, 49)
turtle.write(turtle.pos())      # 在窗口上标注当前坐标，精度暂未学
turtle.pendown()

turtle.goto(50, -50)
turtle.write(turtle.pos())      # 在窗口上标注当前坐标，

# 简写turtle.ht(),隐藏海龟。若显示，可使用turtle.showturtle(),简写turtle.st()
turtle.hideturtle()

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))
turtle.hideturtle()

turtle.done()

编程题 1.18

# 1.18，图 1-19c，绘制五角星
import turtle

turtle.setup(500, 500)  # 设置窗口尺寸
turtle.speed(1)         # 调整绘图速度，便于观察+调教代码

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", move=False,font=("Consolas", 16))

turtle.penup()          # 调整起点位置
turtle.goto(0, 100)
turtle.pendown()

turtle.right(72)        # 调整海龟朝向

for i in range(5):
    turtle.fd(200)
    turtle.right(144)

turtle.setheading(72)       # 调整海龟朝向

turtle.done()

编程题 1.19

# 1.19，图 1-20a，绘制多边形
import turtle

turtle.setup(500, 500)          # 设置窗口尺寸
turtle.speed(1)                 # 调整绘图速度，便于调教代码

turtle.penup()                  # 设置起始坐标
turtle.right(60)
turtle.forward(150)
turtle.pendown()

turtle.setheading(30)
turtle.circle(150, 360, 6)        # 使用内切多边形的画法

turtle.hideturtle()               # 隐藏海龟

turtle.penup()                    # 签名，font 这里有坑，勿踩
turtle.goto(100, 200)
turtle.pendown()
turtle.write("Jackey1999", font=("Consolas", 16))

turtle.done()

编程题1.20、1.21、附加题，暂时未完成。
Jackey1999，2019-03-20