C++多重继承构造函数错误及解决方法

以下是一个C++程序，请告诉我错误在哪里，该怎么修改。

#pragma once
#include<iostream>
#include<string.h>
using namespace std;

enum CPU_Rank { P1 = 1, P2, P3, P4, P5, P6, P7 };

class CPU {
private:
	CPU_Rank rank;
	int CPU_frequency;
	double CPU_voltage;
public:
	CPU(int newRank, int newFrequency, int newVoltage)
	{
		rank = (CPU_Rank)newRank;
		CPU_frequency = newFrequency;
		CPU_voltage = newVoltage;
	};
	CPU()//构造函数重载
	{
		rank = P6;
		CPU_frequency = 3000;
		CPU_voltage = 220;
	}
	CPU(int b)
	{
		CPU_frequency = b;
	}
	~CPU()
	{
		cout << 'Good bye!' << endl;
	}
	CPU(const CPU& p)
	{
		rank = p.rank;
		CPU_frequency = p.CPU_frequency;
		CPU_voltage = p.CPU_voltage;
	};
	CPU_Rank outRank() { return rank; };
	int outF() { return CPU_frequency; };
	double outV() { return CPU_voltage; };
};

class RAM {
private:
	string name;
	int RAM_frequency;
	int RAM_capacity;
public:
	RAM(string Name, int a, int b)
	{
		name = Name;
		RAM_frequency = a;
		RAM_capacity = b;
	};
	RAM()
	{
		name = '未知';
		RAM_frequency = 0;
		RAM_capacity = 0;
	}
	RAM(int a)
	{
		RAM_capacity = a;
	}
	~RAM()
	{
		cout << 'Good bye!' << endl;
	}
	string Pname() { return name; };
	int P_ram_frequency() { return RAM_frequency; };
	int P_ram_capacity() { return RAM_capacity; };

};

class CDROM {
private:
	string Cname;
	int speed;
public:
	CDROM(string CName, int Cspeed)
	{
		Cname = CName;
		speed = Cspeed;
	};
	CDROM()
	{
		Cname = '未知';
		speed = 0;
	};
	CDROM(string M)
	{
		Cname = M;
	}
	~CDROM()
	{
		cout << 'Good bye!' << endl;
	}
	string P_Cname() { return Cname; };
	int Pspeed() { return speed; };
};

class Computer :public CPU,public RAM,public CDROM{

public:
	Computer(int a, int b, int c, string* N, int d, int e, string* M, int f) :CPU(a, b, c), RAM(*N, d, e), CDROM(*M, f) {};
	Computer(int b, int a, string* N) :RAM(a), CPU(b), CDROM(*N) {};
	void run() { cout << 'Computer开始运行！' << endl; }
	void stop() { cout << 'Computer停止运行！' << endl; };
	void output1()
	{  
		cout << '我是组装机' << endl;
		cout << 'CPU:' << endl;
		cout << '等级:' << outRank() << '\n' << '频率：' << outF() << '\n' << '电压：' << outV() << endl;
		cout << 'RAM:' << endl;
		cout << '品牌:' << Pname() << '\n' << '频率：' << P_ram_frequency() << '\n' << '容量：' << P_ram_capacity() << endl;
		cout << 'CDROM:' << endl;
		cout << '品牌:' << P_Cname() << '\n' << '传输速率：' << Pspeed() << endl;
	};
};

int main()
{
	cout << '请按顺序输入一台组装机芯片(等级、频率、电压)、内存(品牌、主频、容量）、光驱参数(品牌、传输速率)：' << endl;

	int newrank, newfrequency, newvoltage;
	cin >> newrank >> newfrequency >> newvoltage;

	string Name;
	int RAM_frequency,RAM_capacity;
	cin >> Name >> RAM_frequency >> RAM_capacity;

	string CName;
	int Cspeed;
	cin >> CName >> Cspeed;

	Computer A (newrank,newfrequency,newvoltage,&Name,RAM_frequency,RAM_capacity,&CName,Cspeed);
	
A.run();
	A.output1();
	A.stop();

	cout << '请按顺序输入一台品牌机内存大小、cpu的主频、光驱品牌：' << endl;
	int a, b;
	string Cname2;
	cin >> a >> b >> Cname2;
	Computer B(b,a,Cname2);


	return 0;
}

错误在于构造函数的调用方式不正确，应该使用基类构造函数初始化列表来初始化基类成员，而不是在子类构造函数中直接调用基类构造函数。应该修改如下：

class Computer :public CPU,public RAM,public CDROM {
public:
    Computer(int a, int b, int c, const string& N, int d, int e, const string& M, int f)
        :CPU(a, b, c), RAM(N, d, e), CDROM(M, f) {};
    Computer(int b, int a, const string& N)
        :CPU(b), RAM(N, 0, a), CDROM() {};

    void run() { cout << 'Computer开始运行！' << endl; }
    void stop() { cout << 'Computer停止运行！' << endl; };

    void output1()
    {  
        cout << '我是组装机' << endl;
        cout << 'CPU:' << endl;
        cout << '等级:' << outRank() << '\n' << '频率：' << outF() << '\n' << '电压：' << outV() << endl;
        cout << 'RAM:' << endl;
        cout << '品牌:' << Pname() << '\n' << '频率：' << P_ram_frequency() << '\n' << '容量：' << P_ram_capacity() << endl;
        cout << 'CDROM:' << endl;
        cout << '品牌:' << P_Cname() << '\n' << '传输速率：' << Pspeed() << endl;
    };
};

int main()
{
    cout << '请按顺序输入一台组装机芯片(等级、频率、电压)、内存(品牌、主频、容量）、光驱参数(品牌、传输速率)：' << endl;

    int newrank, newfrequency, newvoltage;
    cin >> newrank >> newfrequency >> newvoltage;

    string Name;
    int RAM_frequency,RAM_capacity;
    cin >> Name >> RAM_frequency >> RAM_capacity;

    string CName;
    int Cspeed;
    cin >> CName >> Cspeed;

    Computer A(newrank, newfrequency, newvoltage, Name, RAM_frequency, RAM_capacity, CName, Cspeed);

    A.run();
    A.output1();
    A.stop();

    cout << '请按顺序输入一台品牌机内存大小、cpu的主频、光驱品牌：' << endl;
    int a, b;
    string Cname2;
    cin >> a >> b >> Cname2;
    Computer B(b, a, Cname2);

    return 0;
}