l4_v4

#define _CRT_SECURE_NO_WARNINGS
#include "stdafx.h"
#include <stdio.h>
#include <iostream>
#include <conio.h>
#include <string.h>
#include <fstream>
#define SIZE 255

using namespace std;

class String
{
    char* str1;
    char* str2;
public:
    String();
    ~String();
    char operator = (char*);
    void print();
    void set (char*);
    char* run();
};

String::String()
{
    str1 = new char[SIZE];
    str1[0] = '\0';
    str2 = new char[SIZE];
    str2[0] = '\0';
}

String::~String()
{
    delete[] str1;
    delete[] str2;
}

char* String::run()
{
    unsigned int i;
    unsigned int j =0;
    if (fmod(strlen(str1),3.0)==0.0)
    {
        for (i=0; i<strlen(str1);)
        {
            if (fmod(str1[i],3.0)==0.0)
            {
                i++;
            }
            else
            {
                str2[j] = str1[i];
                i++;
                j++;
            }
        }
        str2[j] = '\0';
    }
    else
    {
        strcpy(str2,str1);
    }
    return str2;
};

char String::operator = (char* str1)
{
    strcpy(str2,str1);
    return *str2;
}

void String::set(char *inStr)
{
    unsigned int i;
    for (i=0; i<strlen(inStr); i++)
    {
        str1[i] = inStr[i];
    }
    str1[i] = '\0';
};

void String::print()
{
    cout<<str1<<endl;
    cout<<str2<<endl;
}

void main()
{
    char inStr[256], newStr[256];
    cout<<"Input string: "<<endl;
    cin.getline(inStr, 256);
    String str;
    cout<<endl<<"Source & converted strings:"<<endl;
    str.set(inStr);

    ofstream file("text.txt",ios::out);
    file<<"sourse string: "<<inStr<<"\n"<<"converted string: "<<str.run()<<"\n";
    file.close();

    str.print();

    String *s1, *s2;
    s1 = new String();
    s2 = new String();
    s2->set(inStr);
    s1=s2;
    cout<<endl<<"String, copied using the overloading:"<<endl;
    s1->print();

    _getch();
}