Just tested it with the changes mentioned, and it works for me too.

Instead of: int board[4][4];
Replace with: int** board;
Now we can dynamically allocate space for the 2D board array.

In set_board(), we need to do the dynamic allocation like so:

// First...

The other option is to just sort both arrays which will make traversing the arrays and finding non-duplicates much easier.

Not sure where to start on this one... You haven't really followed the instructions. The instructions state that EACH student data record should be dynamically allocated. Instead your student list...

When adding the node at the end (as you are now doing), you should have the new node point to NULL instead of head. The reason you get it infinitely repeating is because when your end node points to...

What exactly are the requirements? Are you supposed to be adding new nodes to the beginning of the list or the end of the list? Are you sure you are not supposed to get the result you got?

In the...

Since you are adding nodes to the head (start) of the list, the last node you add will be in position 0. The output is correct for the example you gave. I'm assuming the list isn't supposed to be...

To add two times as you have listed, first add the seconds together. If the seconds > 59 you will have to use modulus (%) to find the remainder of the seconds. You can then use this information to...

It should be readfile >> sample; since you are getting input, not outputting.

I have not used them, but I believe the boost library has threads and you can try pthreads as well.

I can guarantee you the problem is not winsock, it is something you are doing.

Can you post a little code where you are having the problem, tell us what you are trying to send and what you are...

Vertices are the points or corners of a polygon. So a square is a polygon with 4 vertices, a triangle is a polygon with 3 vertices, etc.

To be a bit clearer, you can use the stringstream class like so:

#include <iostream>
#include <sstream>
using namespace std;

int main() {
stringstream ss; // our stringstream object
...

The first error means that the function ingresar_datos has never been declared - if you look through the code, there is indeed no function with that name.
The rest of the errors are because the...