Exo4.cpp

#include <iostream>
#include <string.h>

using namespace std;

class String
{
    private :
        static const int MAX_REF;
        char *charArray;
        int length;
        int *ref;
        void countChar();

    public :
        String();
        String(const char[]);
        String(const String&);
        ~String();
        char* getCharArray();
        int getLength();
        String operator+(String);
        String& operator=(const String&);
        void print();
        String toUpper(String);
};

    const int String::MAX_REF = 26;

    String::String()
    {
        length = 0;
        charArray = NULL;
        ref = new int[MAX_REF];
        countChar();
    }

    String::String(const char paramCharArray[])
    {
        length = strlen(paramCharArray);
        charArray = new char[length];
        ref = new int[MAX_REF];
        for(int i = 0; i < length; i++)
        {
            charArray[i] = paramCharArray[i];
        }
        countChar();
    }

    String::String(const String &strSrc)
    {
        length = strSrc.length;
        charArray = new char[length];
        ref = new int[MAX_REF];
        for(int i = 0; i < length; i++)
            charArray[i] = strSrc.charArray[i];
        for(int i = 0; i < MAX_REF; i++)
            ref[i] = strSrc.ref[i];
    }

    String::~String()
    {
        delete ref;
        delete charArray;
    }

    char* String::getCharArray()
    {
        return charArray;
    }

    int String::getLength()
    {
        return length;
    }

    String String::operator+(String op)
    {
        String tmpStr;
        tmpStr.length = length + op.length;
        tmpStr.charArray = new char[tmpStr.length];
        int i;
        for(i = 0; i < length; i++)
            tmpStr.charArray[i] = charArray[i];

        for(int j = 0; j < op.length; i++, j++)
            tmpStr.charArray[i] = op.charArray[j];

        for(int j = 0; j < MAX_REF; j++)
            tmpStr.ref[j] = ref[j] + op.ref[j];

        return tmpStr;
    }

    String& String::operator=(const String &op)
    {
        if(this != &op)
        {
            delete ref;
            delete charArray;
            charArray = new char[length = op.length];
            ref = new int[MAX_REF];
            for(int i = 0; i < length; i++)
                charArray[i] = op.charArray[i];

            for(int i = 0; i < MAX_REF; i++)
                ref[i] = op.ref[i];
        }
        return *this;
    }

    void String::print()
    {
        for(int i = 0; i < length; i++)
        {
            cout << charArray[i] << endl;
        }
        /*for(int i = 0; i < nbValue; i++)
        {
            cout << "Nombre de ref : " << ref[i] << endl;
        }*/
    }

    void String::countChar()
    {
        char lowerChar;
        int j = 0;
        for(int i = 0; i < length; i++)
        {
            ref[j] = 0;
            lowerChar = tolower(charArray[i]);
            if(lowerChar >= 'a' && lowerChar <= 'z')
            {
                j = lowerChar - 'a';
                ref[j]++;
            }
        }
    }

    String String::toUpper(String strSrc)
    {
        String tmpSrc;
        for(int i = 0; i < strSrc.length; i++)
            tmpSrc.charArray[i] = toupper(strSrc.charArray[i]);

        return tmpSrc;
    }

int main()
{
    String test("!!!Hello World!!!"), test2, test3;
    test.print();
    test2 = test;
    cout << "------------------------" << endl;
    test2.print();
    test3 = test + test2;
    cout << "------------------------" << endl;
    test3.print();
    return 0;
}