Python温度判断程序输入小数时报错的原因咨询

报错根源 #

你代码里的int(input("What temperature are you?"))是核心问题：int()函数只能转换纯整数格式的字符串（比如"37"），当输入带小数点的内容（比如"37.888888"）时，它无法处理这类字符串，直接抛出ValueError导致程序崩溃。

修正方案 #

方案1：支持小数输入

把int()替换成float()，这样既能接收整数，也能处理小数输入：

temperature = float(input("What temperature are you?"))

if temperature >= 37 and temperature < 50:
    print("your temperature is healthy, as it is", "%.2f" % temperature)
else:
    print("You said your temperature was", "%.2f" % temperature, "You are unhealthy")

方案2：添加小数取整逻辑

如果需要对输入的小数做取整处理（比如保留两位小数），可以用round()函数：

# 保留两位小数
temperature = round(float(input("What temperature are you?")), 2)

if temperature >= 37 and temperature < 50:
    print("your temperature is healthy, as it is", "%.2f" % temperature)
else:
    print("You said your temperature was", "%.2f" % temperature, "You are unhealthy")

如果需要向上/向下取整，要先导入math模块：

import math

# 向上取整
temperature = math.ceil(float(input("What temperature are you?")))
# 或者向下取整
temperature = math.floor(float(input("What temperature are you?")))

if temperature >= 37 and temperature < 50:
    print("your temperature is healthy, as it is", temperature)
else:
    print("You said your temperature was", temperature, "You are unhealthy")

内容的提问来源于stack exchange，提问作者VincentOfTheHighlands