宠物 BMI/肥胖

复制import math

# 宠物BMI计算（猫狗通用）
# 输入：体重(kg), 身高/体长(cm), 品种体型系数(小型=1.0, 中型=0.9, 大型=0.8)
def pet_bmi(weight_kg, height_cm, breed_factor=1.0):
    if height_cm <= 0 or weight_kg <= 0:
        raise ValueError("身高和体重必须为正数")
    
    # 使用改良版BMI公式：体重(kg) / (身高(m) ^ 2.5) * 体型系数
    height_m = height_cm / 100
    bmi = weight_kg / (height_m ** 2.5) * breed_factor
    
    # 猫狗通用判定标准（参考WSAVA指南）
    if bmi < 15:
        return {"bmi": round(bmi, 1), "status": "偏瘦", "advice": "增加食量，检查寄生虫"}
    elif bmi < 25:
        return {"bmi": round(bmi, 1), "status": "正常", "advice": "保持当前饮食和运动"}
    elif bmi < 30:
        return {"bmi": round(bmi, 1), "status": "超重", "advice": "减少零食，增加运动"}
    else:
        return {"bmi": round(bmi, 1), "status": "肥胖", "advice": "建议兽医干预，控制饮食"}

# 示例：10kg的猫，体长45cm，小型犬/猫体型
result = pet_bmi(10, 45, breed_factor=1.0)
print(result)  # {'bmi': 23.5, 'status': '正常', 'advice': '保持当前饮食和运动'}

# 示例：25kg的柯基，体长50cm，中型犬体型
result2 = pet_bmi(25, 50, breed_factor=0.9)
print(result2)  # {'bmi': 31.8, 'status': '肥胖', 'advice': '建议兽医干预，控制饮食'}

复制package main

import (
	"fmt"
	"math"
)

// PetBMIResult 存储计算结果
type PetBMIResult struct {
	BMI    float64 `json:"bmi"`
	Status string  `json:"status"`
	Advice string  `json:"advice"`
}

// CalculatePetBMI 计算宠物BMI
// weightKg: 体重(kg), heightCm: 体长/身高(cm), breedFactor: 体型系数(小型1.0, 中型0.9, 大型0.8)
func CalculatePetBMI(weightKg, heightCm, breedFactor float64) (PetBMIResult, error) {
	if heightCm <= 0 || weightKg <= 0 {
		return PetBMIResult{}, fmt.Errorf("身高和体重必须为正数")
	}

	heightM := heightCm / 100
	bmi := weightKg / math.Pow(heightM, 2.5) * breedFactor
	bmi = math.Round(bmi*10) / 10

	var status, advice string
	switch {
	case bmi < 15:
		status = "偏瘦"
		advice = "增加食量，检查寄生虫"
	case bmi < 25:
		status = "正常"
		advice = "保持当前饮食和运动"
	case bmi < 30:
		status = "超重"
		advice = "减少零食，增加运动"
	default:
		status = "肥胖"
		advice = "建议兽医干预，控制饮食"
	}

	return PetBMIResult{BMI: bmi, Status: status, Advice: advice}, nil
}

func main() {
	// 示例：10kg的猫，体长45cm
	result, _ := CalculatePetBMI(10, 45, 1.0)
	fmt.Printf("%+v\n", result) // {BMI:23.5 Status:正常 Advice:保持当前饮食和运动}

	// 示例：25kg的柯基，体长50cm
	result2, _ := CalculatePetBMI(25, 50, 0.9)
	fmt.Printf("%+v\n", result2) // {BMI:31.8 Status:肥胖 Advice:建议兽医干预，控制饮食}
}

复制/**
 * 宠物BMI计算（猫狗通用）
 * @param {number} weightKg - 体重(kg)
 * @param {number} heightCm - 体长/身高(cm)
 * @param {number} [breedFactor=1.0] - 体型系数(小型1.0, 中型0.9, 大型0.8)
 * @returns {{bmi: number, status: string, advice: string}}
 */
function petBMI(weightKg, heightCm, breedFactor = 1.0) {
  if (heightCm <= 0 || weightKg <= 0) {
    throw new Error('身高和体重必须为正数');
  }

  const heightM = heightCm / 100;
  const bmi = weightKg / Math.pow(heightM, 2.5) * breedFactor;
  const roundedBMI = Math.round(bmi * 10) / 10;

  let status, advice;
  if (roundedBMI < 15) {
    status = '偏瘦';
    advice = '增加食量，检查寄生虫';
  } else if (roundedBMI < 25) {
    status = '正常';
    advice = '保持当前饮食和运动';
  } else if (roundedBMI < 30) {
    status = '超重';
    advice = '减少零食，增加运动';
  } else {
    status = '肥胖';
    advice = '建议兽医干预，控制饮食';
  }

  return { bmi: roundedBMI, status, advice };
}

// 示例：10kg的猫，体长45cm
console.log(petBMI(10, 45, 1.0));
// { bmi: 23.5, status: '正常', advice: '保持当前饮食和运动' }

// 示例：25kg的柯基，体长50cm
console.log(petBMI(25, 50, 0.9));
// { bmi: 31.8, status: '肥胖', advice: '建议兽医干预，控制饮食' }