为什么我的 IDE 告诉我 Squirtle.cpp 构造函数中未定义"newHp"？

我是C++的新手，正在练习继承，我键入了下面的代码。在Squirtle.cpp中，visualstudio告诉我，newHp、newLevel、newExperience和newAttack都是未定义的。为什么会出现这种情况？我该如何修复它？我在这里查找了其他示例，但我想它们不会出错，因为它们的基构造函数和子构造函数都在同一个文件中？

****口袋妖怪.h***

#ifndef _POKEMON_
#define _POKEMON_
#include <string>
#include <iostream>
using namespace std;
class Pokemon {
//Members
private:
    int hp;
    int level;
    int experience;
    int attack;
//Member functions
public:
    Pokemon(int newHp, int newLevel, int newExperience, int newAttack);
    virtual ~Pokemon();
    int getHp();
    int getAttack();
    void setHp(int newHp);
    void setAttack(int newAttack);
    void physicalAttack(Pokemon &target);
};
#endif

****口袋妖怪.cpp***

#include "Pokemon.h"

Pokemon::Pokemon(int newHp, int newLevel, int newExperience, int newAttack)
{
    hp = newHp;
    level = newLevel;
    experience = newExperience;
    attack = newAttack;
}
Pokemon::~Pokemon()
{
}
int Pokemon::getHp()
{
    return hp;
}
int Pokemon::getAttack()
{
    return attack;
}
void Pokemon::setHp(int newHp)
{
    hp = newHp;
}
void Pokemon::setAttack(int newAttack)
{
    attack = newAttack;
}
void Pokemon::physicalAttack(Pokemon &target)
{
    target.setHp(target.getHp() - getAttack());
    cout << "Dealt " << getAttack() << "damages to target! Hp is now at " << target.getHp() << "!";
}

****Squirtle.h***

#include "Pokemon.h"
#ifndef _SQUIRTLE_
#define _SQUIRTLE_
class Squirtle :Pokemon{
//members
private:
    int mana;
//member functions
public:
    Squirtle(int newMana);
    int getMana();
    void setMana(int newMana);
    void freeze(Pokemon &target);
};
#endif

****Squirtle.cpp***

#include "Squirtle.h"
Squirtle::Squirtle(int newMana):Pokemon(newHp, newLevel, newExperience, newAttack)
{
    mana = newMana;
}
int Squirtle::getMana()
{
    return mana;
}
void Squirtle::setMana(int newMana)
{
    mana = newMana;
}
void Squirtle::freeze(Pokemon &target)
{
    setMana(getMana() - 1);
    target.setAttack(0);
    cout << "Squirtle has frozen the target! Its attack is now reduced to 0!";
}