#include <iostream>
#include <fstream>
#define MAX 300
using namespace std;

class CharArray
{
    char a[MAX];
    int size;

public:
    CharArray(void)
    {
        this->size = 0;
    }

    CharArray(const CharArray &ar)
    {
        this->size = ar.size;
        for (int i = 0; i < this->size; i++)
            this->a[i] = ar.a[i];
    }
    CharArray(char b[], int bSize)
    {
        this->size = bSize;
        for (int i = 0; i < bSize; i++)
            this->a[i] = b[i];
    }
    void add(char ch, int p)
    {
        if (this->size >= MAX)
        {
            return;
        }
        size++;
        for (int i = size - 1; i >= p; i--)
            this->a[i] = this->a[i - 1];
        a[p] = ch;
    }
    void remove(int p)
    {
        if (this->size == 0)
        {
            return;
        }
        this->size--;
        for (; this->a[p]; p++)
            this->a[p] = this->a[p + 1];
    }
    friend CharArray operator+(char ch, CharArray ar);
    friend ostream &operator<<(ostream &os, CharArray ar);
    CharArray operator*(int k)
    {
        CharArray temp;
        temp.size = this->size * k;
        int j = 0;
        for (int i = 0; i < temp.size; i++)
        {
            temp.a[i] = this->a[j];
            j++;
            if (j == this->size)
                j = 0;
        }
        return temp;
    };
};
CharArray operator+(char ch, CharArray ar)
{
    if (ar.size == 200)
        return ar;
    ar.size++;
    for (int i = ar.size - 1; i > 0; i--)
    {
        ar.a[i] = ar.a[i - 1];
    }
    ar.a[0] = ch;
    return ar;
}

ostream &operator<<(ostream &os, CharArray ar)
{
    if(ar.size == 0) return os;
    for (int i = 0; i < ar.size; i++)
        os << ar.a[i] << " ";
    os << endl;
    return os;
}

void testBai2()
{
    char a[] = {'X', 'Y', 'Z'};
    CharArray ar(a, 3);
    CharArray ar2(ar);
    cout << "Kiem tra cac ham thanh vien:" << endl;
    cout << ar << ar2;
    ar.add('a', 0);
    ar.add('b', 4);
    ar.add('c', 1);
    cout << ar;
    for (int i = 0; i < 10; i++)
    {
        ar.remove(i);
        cout << ar;
    }
    cout << "Kiem tra cac phep toan:" << endl;
    ar = 'a' + ('b' + ('c' + ar));
    cout << ar;
    for (int i = 1; i < 4; i++)
        cout << ar * i;
}

int main(int argc, char const *argv[])
{
    testBai2();
}