3semlab1 Final

#include <iostream>
#include <fstream>

using namespace std;

enum status
{
    Start = 0,
    PossibleComment = 1,
    Comment1 = 2,
    Comment2 = 3,
    PossibleEnd = 4,
    Char = 5,
    String = 6
};

int main ()
{
    ifstream fin; ofstream fout;
    fin.open ("input.txt"); fout.open ("output.txt");
    status st = Start;
    if (fin)
    {
        char symbol;
        while (fin.get(symbol))
        {
            cout<<symbol;
            switch (st)
            {
            case Start:
                if (symbol == '/')
                {
                    st = PossibleComment;
                    break;
                }
                else
                {
                    if (symbol == '\'')
                    {
                        st = Char;
                        fout << symbol;
                        break;
                    }
                    else
                    {
                        if (symbol == '"')
                        {
                            st = String;
                            fout << symbol;
                            break;
                        }
                        else
                        {
                            fout << symbol;
                            break;
                        }
                    }
                }
            case PossibleComment:
                if (symbol == '/')
                {
                    st = Comment1;
                    break;
                }
                else
                {
                    if (symbol == '*')
                    {
                        st = Comment2;
                        break;
                    }
                    else
                    {
                        fout << symbol;
                        break;
                    }
                }
            case Comment1:
                if (symbol == '\n')
                {
                    st = Start;
                    fout<<symbol;
                    break;
                }
                else
                {
                    break;
                }
            case Comment2:
                if (symbol == '*')
                {
                    st = PossibleEnd;
                    break;
                }
                else
                {
                    break;
                }
            case PossibleEnd:
                if (symbol == '/')
                {
                    st = Start;
                    break;
                }
                else if(symbol == '*')
                {
                    break;
                }
                else
                {
                    st = Comment2;
                    break;
                }
            case Char:
                if (symbol == '\'' || symbol == '\n')
                {
                    fout << symbol;
                    st = Start;
                    break;
                }
                else
                {
                    fout << symbol;
                    break;
                }
                if (symbol == '\\')
                {
                    fout << symbol;
                    st = Char;
                    break;
                }
            case String:
                if (symbol == '\'' || symbol == '"')
                {
                    fout << symbol;
                    st = Start;
                    break;
                }
                else
                {
                    fout << symbol;
                    break;
                }
                if (symbol == '\\')
                {
                    st = String;
                    fout << symbol;
                    break;
                }
            }
        }
    }
    fin.close(); fout.close();
    return 0;
}