子类构造函数参数列表，子类向父类传参数

#include "stdafx.h"
#include <iostream>
#include <string.h>
#include <conio.h>
using namespace std;


class animal
{
public:
animal(int height, int weight)
{
cout << "animal construct" << endl;
}
};


class fish :public animal
{
public:
fish(int _a) :animal(400, 300), a(_a)
{
cout << "fish construct" << endl;
}
private:


int a;
};


int main()
{
fish fh(2);
getchar();
    return 0;

}

执行结果：