int main( int argc, char** argv ) {

    (void) argc; // unsed
    (void) argv; // unsed

    FILE *in = stdin, *out = stdout;
    if(argc > 1){

        in = fopen(argv[1], "r");
        if(in ==NULL){
            printf("Neotevren soubor %s \n", argv[1]);
                    in = stdin;

        }

    }
    if(argc == 3){
        out = fopen(argv[2], "w+");
    }

    char ch;
    enum{start, slash, dslash, ignore,lslash, eolslash} state = start;

    while((ch = fgetc(in)) != EOF){
    switch (state){
    case start:
        if ((ch == '\'') || (ch == '\"')){
                state = ignore;
                fputc(ch, out);
                break;
    }
        else if(ch == '/'){

            state = slash;
        }else{

            fputc(ch, out);
        }

        break;
    case slash:
        if(ch== '/'){
            state=dslash;
        }else if(ch== '*'){
            state=lslash;
        }

            else{

            state=start;
            fputc('/', out);
            fputc(ch, out);
        }
        break;
    case dslash:
        if(ch == '\n'){
            fputc(ch, out);
            state = start;
        }
        break;
    case ignore:
        if((ch == '\'') || (ch == '\"')){
           state = start;
           fputc(ch, out);
        }else{
            fputc(ch, out);
        }

        break;

    case lslash:
        if (ch== '*'){
            state = eolslash;
        }
        break;
    case eolslash:
        if(ch== '/'){
            state = start;
        } else {
            state = lslash;
        }
        break;
    default:
        break;


    }
    }
    if(argc > 1){
    fclose(in);}
    if(argc >2){
    fclose(out);}
    return 0;
}