Python输入输出练习，运算练习，turtle初步练习

print(‘Hello World！‘)

name=input(‘输入姓名‘)
print(‘%s同学，你好‘%name)

print(‘和=‘,int(input(‘数字a=‘))+int(input(‘数字b=‘)))

三角新面积a=input(‘三角形的边a=‘)
b=input(‘三角形的边b=‘)
c=input(‘三角形的边c=‘)
p=(float(a)+float(b)+float(c))/2
s=(float(p)*(float(p)-float(a))*(float(p)-float(b))*(float(p)-float(c)))**0.5

print(‘面积=‘,float(s))

a=input(‘半径=‘)
s=3.14*(float(a)**2)
print(‘面积=‘,s)

同切圆import turtle
turtle.circle(10)
turtle.circle(50)

五角星import turtle
turtle.forward(100)
turtle.right(144)
turtle.forward(100)
turtle.right(144)
turtle.forward(100)
turtle.right(144)
turtle.forward(100)
turtle.right(144)
turtle.forward(100)

黄色五角心import turtle
turtle.color("yellow")
turtle.bgcolor("red")
turtle.fillcolor("yellow")
turtle.speed(1)
turtle.begin_fill()
for i in range(5):
  turtle.forward(200)
  turtle.right(144)
turtle.end_fill()