Python输入输出练习，运算练习，turtle初步练习

Posted 2020-10-13

1.Hello World！

1	print(‘Hello World!‘)

 

简单交互（交互式，文件式）

1 name=input(‘Please in put your name:‘)
2 print(‘hi {}‘.format(name))
3 print(‘Mr {} hobbit is 吃饭，睡觉，打豆豆‘.format(name[0]))
4 print(‘Dear {} you should go to work!‘.format(name[1]))

 

 

3.用户输入两个数字，计算并输出两个数字之和：

print(‘sub is:{}‘.format(float(input(‘第一个数:‘))+float(input(‘第二个数：‘))))

 

4.用户输入三角形三边长度，并计算三角形的面积：（海伦公式）

1 a=input(‘请输入第一条边：‘)
2 b=input(‘请输入第二条边：‘)
3 c=input("请输入第三条边：")
4 C=(float(a)+float(b)+float(c))
5 S=(C/2*(float(C/2)-float(a))*(float(C/2)-float(b))*(float(C/2)-float(c)))**0.5
6 print(‘三角形的面积是{}‘.format(S))

 

 

 5.输入半径，计算圆的面积。

r=input(‘please input r:‘)
area=3.1415*float(r)*float(r)
print("{:.2f}".format(area))

 

6.画一组同切圆

1 import turtle
2 turtle.pensize(10)
3 turtle.circle(20)
4 turtle.circle(40)
5 turtle.circle(80)
6 turtle.circle(120)

 

 

 

7.画一个五角星

 

1 import turtle as t 
2 t.speed(1)
3 for i in range(5):
4     t.forward(100)
5     t.right(144)

 

 

8.画一个全黄色的五角星

 

 1 import turtle
 2 turtle.color(‘yellow‘)
 3 turtle.fillcolor(‘yellow‘)
 4 turtle.speed(1)
 5 turtle.pensize(10)
 6 turtle.begin_fill()
 7 for i in range(5):
 8     turtle.forward(200)
 9     turtle.right(144)
10 turtle.end_fill()

 

 

附加题1：画一组同心圆:

 1 import turtle
 2 turtle.penup()
 3 turtle.goto(0,-100)
 4 turtle.pendown()
 5 turtle.circle(100)
 6 turtle.penup()
 7 turtle.goto(0,-80)
 8 turtle.pendown()
 9 turtle.circle(80)
10 turtle.penup()
11 turtle.goto(0,-60)
12 turtle.pendown()
13 turtle.circle(60)
14 turtle.penup()
15 turtle.goto(0,-40)
16 turtle.pendown()
17 turtle.circle(40)

 

 

画国旗上的五个五角星

 

import turtle
def draw_square():
    turtle.color(‘red‘)
    turtle.fillcolor(‘red‘)
    # turtle.speed(1)
    turtle.penup()
    turtle.goto(-200,200)
    turtle.pendown()
    turtle.begin_fill()
    turtle.forward(400)
    turtle.right(90)
    turtle.forward(200)
    turtle.right(90)
    turtle.forward(400)
    turtle.right(90)
    turtle.forward(200)
    turtle.right(90)
    turtle.end_fill()
    # time.sleep(5)
def draw_big_star():
    turtle.color(‘yellow‘)
    turtle.fillcolor(‘yellow‘)
    # turtle.speed(1)
    turtle.penup()
    turtle.goto(-175,155)
    turtle.pendown()
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(50)
        turtle.right(144)
    turtle.end_fill()
def draw_smallstar(x,y,z):
    turtle.color(‘yellow‘)
    turtle.fillcolor(‘yellow‘)
    # turtle.speed(1)
    turtle.penup()
    turtle.goto(x,y)
    turtle.pendown()
    turtle.begin_fill()
    turtle.right(z)
    for i in range(5):
        turtle.forward(15)
        turtle.right(144)
    turtle.end_fill()
draw_square()
draw_big_star()
draw_smallstar(-110,175,5)
draw_smallstar(-90,155,15)
draw_smallstar(-95,125,25)
draw_smallstar(-110,105,0)