void fileNameDiscompose(string road,string s_array[])

{

    int block = ;

    //string s_array[30]; //局部变量，如果使用return外面得不到想要的

    string tmp = "";

    for(int i = ; i < road.length(); i++){

        if(road[i] != '\\'){

            tmp += road[i];

        }

        else{

            s_array[block] = tmp;

            tmp = "";

            block++;

        }

    }

    s_array[block] = tmp;

}