Thread: Working with files v2

Hello, I posted a thread regarding files not long ago, but I came across with a few more challenges along the way. The code is related to the slidding puzzle game.

Let's say I got the following .txt file:

Code:

1 2 4
3 6 5
8   7
             John   15 M     55
           William  13 F    120

The board that you see is an unsolved puzzle that "John" and "William" managed to finish in, respectively, 55 and 120 seconds.

After the user finishes a puzzle he must enter his name ("John"), age("15) and gender ("M"). The program will write the information to the file and the time the user took to solve the puzzle ("John 15 M 55").

The program itself is supposed to make a top 5 with the best times and the info regarding the same. This means that whenever there's a new time, THE NEW TIME has to be compared with the ones already in that file.

Ok so, in the thread I talked about earlier I managed to retrieve the times from the file and put them in a vector and sort them out with the new time. Although there was nothing but the times themselves in the vector.

My problem is: How to retrieve the times out of the file, sort them out with the new time and reorganize the file with the respective user info and time.

Thanks in advance

You should know by now you need to show what you've tried. Where's the code?

Jim

I'm really lost at this point, need some guidelines to execute any code at all.
The one you helped me with does not allow to retrieve data when there's anything but integers/numbers in the file.

I suppose I'm required to retrieve the entire line ("John 15 M 55") through a stringstream and then divide it into other stringstreams so I can work with the times (and put them in a vector).

>getline(file, line)
This gets the whole line, and I'm lost beyond this point.

>getline(file, line)
This gets the whole line, and I'm lost beyond this point.

You mentioned stringstream did you look up that class's documentation?

Once you create an instance of the stringstream it work the same way cin works.

Jim

I made some code which gets the lines from the file. Yet it does not seem to be working properly.

Code:

vector<string> read_top_ten_from_txt (int board_size, int puzzle_number)
{
        vector<string> top_ten;
		string filename, line;
        
 
        /* if file exists, read top 10 from it */
        if (Checks_for_file("puzzle_3x3_001.txt"))
        {
                /* opening input file stream */
                ifstream read_from_txt ("puzzle_3x3_001.txt");
 
                for (int i = 0; i < board_size + 1; i++)
                {
                        getline(read_from_txt, line);
                }
                while (true)
                {
                        getline(read_from_txt, line);
                        if (line[0] == '\0')
                        {
                                break;                         
                        }
                        top_ten.push_back(line);
                }
        }
        else
        {
                cout << "Error: Couldn't open file (" << "puzzle_3x3_001.txt" << ").";
        }
       
        return top_ten;
}


int main()
{
	vector<string> vec = read_top_ten_from_txt(3,001);


	for (int i = 0; i < vec.size(); i++)
	{
		cout << vec[i] <<endl;
	}


}

Doesn' seem to work properly isn't a good problem description.
Without knowing the contents of the file it's even worse.
Anyway if the file doesn't contain more then board_size +1 lines not much will be pushed onto top_ten
Kurt