宠物每日卡路里

复制import math

# 使用简化版 Resting Energy Requirement (RER) 公式
# RER = 70 * (体重kg)^0.75
# 每日卡路里 = RER * 活动系数

def daily_calories(weight_kg, activity_level):
    if weight_kg <= 0:
        raise ValueError("体重必须大于0")
    
    # 活动系数：低=1.2，中=1.6，高=2.0
    activity_factors = {"低": 1.2, "中": 1.6, "高": 2.0}
    factor = activity_factors.get(activity_level)
    if factor is None:
        raise ValueError("活动量必须为'低'、'中'或'高'")
    
    rer = 70 * (weight_kg ** 0.75)
    return round(rer * factor, 1)

# 示例：10kg 狗，中等活动
print(daily_calories(10, "中"))  # 约 393.6 kcal

复制package main

import (
	"fmt"
	"math"
)

// 活动系数映射
var activityFactors = map[string]float64{
	"低": 1.2,
	"中": 1.6,
	"高": 2.0,
}

// DailyCalories 计算宠物每日卡路里
func DailyCalories(weightKg float64, activityLevel string) (float64, error) {
	if weightKg <= 0 {
		return 0, fmt.Errorf("体重必须大于0")
	}
	factor, ok := activityFactors[activityLevel]
	if !ok {
		return 0, fmt.Errorf("活动量必须为'低'、'中'或'高'")
	}
	rer := 70 * math.Pow(weightKg, 0.75)
	return math.Round(rer*factor*10) / 10, nil
}

func main() {
	cal, _ := DailyCalories(10, "中")
	fmt.Printf("%.1f kcal\n", cal) // 393.6 kcal
}

复制// 宠物每日卡路里计算（浏览器或 Node.js）
function dailyCalories(weightKg, activityLevel) {
  if (weightKg <= 0) throw new Error('体重必须大于0');
  
  const factors = { '低': 1.2, '中': 1.6, '高': 2.0 };
  const factor = factors[activityLevel];
  if (!factor) throw new Error("活动量必须为'低'、'中'或'高'");
  
  const rer = 70 * Math.pow(weightKg, 0.75);
  return Math.round(rer * factor * 10) / 10;
}

// 示例
console.log(dailyCalories(10, '中')); // 393.6