Python第一节课

print("hello world")

name=input("What's your name:")
print("{},it is good for you to study Phython!".format(name))

a=input("a:")
b=input("b:")
print(float(a)+float(b))

a=input("a=")
b=input("b=")
c=input("c=")
l=(float(a)+float(b)+float(c))/2
d=float(l)*(float(l)-float(a))*(float(l)-float(b))*(float(l)-float(c))
s=float(d)**0.5
print(float(s))

r=input("r=")
s=3.14*float(r)*float(r)
print(float(s))

import turtle

turtle.shape('turtle')
turtle.speed(5)
turtle.color('red')
turtle.circle(50)
turtle.circle(75)
turtle.circle(100)

import turtle
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)

import turtle
turtle.shape('turtle')
turtle.speed(50)
turtle.color('green')
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)
turtle.forward(200)
turtle.right(144)