用C++代码定义一个Cat类，其拥有静态数据成员numOfCats，记录已经创建的Cat对象的个体数目，静态数据成员numOfCatsGo，记录已经销毁的Cat对象的个体数目；静态成员函数getNumOfCats(bool IsConstruted)，当IsConstruted为true时读取numOfCats，当IsConstruted为false时读取numOfCatsGo；数据私有成员weight，记录Cat对象的体重。 定义一个Boat类，其拥有数据私有成员weight，记录Boat对象的体重。 根据上述请完成如下内容： （1）请设计一个Cat类，体会静态数据成员和静态成员函数的用法。 （2）定义一个Cat类和Boat类的友元函数getTotalWeight()，计算一个Cat对象和Boat对象的体重和并返回。 输入格式 第一行输入正整数N，表示即将创建Cat类对象的个数， 第二行输入浮点数W0，表示一个Cat对象的体重 第三行输入浮点是W1，表示一个Boat对象的体重。 输出格式 首先先输出2N行数据，分别表示当前Cat对象创建时已经创建的对象个数，已经在内存中存在的对象个数；当前Cat对象销毁时，Cat对象在内存中存在的对象个数。(对应N个对象) 再输出1行表示Cat对象创建时已经创建的对象个数，已经在内存中存在的对象个数。（新创建一个对象，用于后续体重和计算） 然后输出一个Cat对象与一个Boat对象的体重和。 最后输出Cat对象销毁时，Cat对象在内存中存在的对象个数。 输入样例 复制 3 60.1 80.1 输出样例 复制 Cat Object is constructing, the constructed Number is 1, and the living Number is 1 Cat Object is deconstructing, and the living Number is 0 Cat Object is constructing, the constructed Number is 2, and the living Number is 1 Cat Object is deconstructing, and the living Number is 0 Cat Object is constructing, the constructed Number is 3, and the living Number is 1 Cat Object is deconstructing, and the living Number is 0 Cat Object is constructing, the constructed Number is 4, and the living Number is 1 140.2 Cat Object is deconstructing, and the living Number is 0

#include <iostream>
using namespace std;

class Boat;

class Cat {
private:
    static int numOfCats;
    static int numOfCatsGo;
    float weight;
public:
    Cat(float w);
    ~Cat();
    static int getNumOfCats(bool IsConstruted);
    friend float getTotalWeight(Cat& c, Boat& b);
};

class Boat {
private:
    float weight;
public:
    Boat(float w) : weight(w) {}
    friend float getTotalWeight(Cat& c, Boat& b);
};

int Cat::numOfCats = 0;
int Cat::numOfCatsGo = 0;

Cat::Cat(float w) : weight(w) {
    numOfCats++;
    cout << "Cat Object is constructing, the constructed Number is " << numOfCats << ", and the living Number is " << numOfCats - numOfCatsGo << endl;
}

Cat::~Cat() {
    numOfCatsGo++;
    cout << "Cat Object is deconstructing, and the living Number is " << numOfCats - numOfCatsGo << endl;
}

int Cat::getNumOfCats(bool IsConstruted) {
    if (IsConstruted) {
        return numOfCats;
    } else {
        return numOfCatsGo;
    }
}

float getTotalWeight(Cat& c, Boat& b) {
    return c.weight + b.weight;
}

int main() {
    int N;
    float w0, w1;
    cin >> N >> w0 >> w1;
    for (int i = 0; i < N; i++) {
        Cat c(w0);
    }
    cout << "Cat Object is constructing, the constructed Number is " << Cat::getNumOfCats(true) << ", and the living Number is " << Cat::getNumOfCats(true) - Cat::getNumOfCats(false) << endl; 
    Boat b(w1);
    cout << getTotalWeight(Cat(w0), b) << endl;
    cout << "Cat Object is deconstructing, and the living Number is " << Cat::getNumOfCats(true) - Cat::getNumOfCats(false) << endl;
    return 0;
}