课上

TempStr = input("请输入带有符号的温度值:")
if TempStr[-1] in ['F','f']:
C = (eval(TempStr[0:-1])-32)/1.8
print("转换后的温度是{:.2f}C".format(C))
elif TempStr[-1] in ['C','c']:
F = 1.8*eval(TempStr[0:-1]) + 32
print("转换后的温度是{:.2f}F".format(F))
else:
print("输入格式错误")

TempStr = input("请输入带有输入符号的温度值：")
if TempStr[0] in ['F','f']:
C = (eval(TempStr[1:])-32)/1.8
print("转换后的温度是{:.2f}C".format(C))
elif TempStr[0] in ['C','c']:
F = 1.8*eval(TempStr[1:]) + 32
print("转换后的温度是{:.2f}F".format(F))
else:
print("输入格式错误")

TempStr = input("请输入带有输入符号的温度值：")
if TempStr[-1] in ['F','f']:
C = (eval(TempStr[0:-1])-32)/1.8
print("转换后的温度是{:.2f}C".format(C))
elif TempStr[-2:] in ['Fa','fa']:
C = (eval(TempStr[0:-2])-32)/1.8
print("转换后的温度是{:.2f}C".format(C))
elif TempStr[-1] in ['C','c']:
F = 1.8eval(TempStr[0:-1]) + 32
print("转换后的温度是{:.2f}F".format(F))
elif TempStr[-2:] in ['Ce','ce']:
F = 1.8eval(TempStr[0:-2]) + 32
print("转换后的温度是{:.2f}F".format(F))
else:
print("输入格式错误")

import turtle
turtle.setup(650,350,200,200)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)
turtle.pencolor("purple")
turtle.seth(-40)
for i in range(4):
turtle.circle(40,80)
turtle.circle(-40,80)
turtle.circle(40, 80/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40 * 2/3)