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


# TempStr = input("请输入温度：")
# if TempStr[-1] in ['F', 'f']:
#     C = (eval(TempStr[0:-1]) - 32) / (9/5)
#     print("转换后的温度为{:.2f}C".format(C))
# elif TempStr[-1] in ['C', 'c']:
#     F = (eval(TempStr[0:-1])) * 1.8 + 32
#     print("转换后的温度为{:.2f}F".format(F))
# else:
#     print("输入格式有误！")