Question

I started studying computer science a few months ago so this question may be a bit stupid, but I’d appreciate if someone could help me.
So my teacher asked us to make our version of a game called Bejeweled, I think I did ok so far but I started having this problem where I get the following error message : [Linker error] undefined reference to `change_position’. For some reason the function change_position isn’t letting my code compile, and I really can’t understand why. In the following code the function has a “//” on the main function and it works fine, but without the // it gets that message. Can anyone explain me how to make it work? It would be even better if someone explained why it isn’t working too. Thanks a lot and sorry for any english mistake.
Thanks a lot, I fixed the mistake I was making and now it works properly. You guys are awesome.

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void create_matrix (int matriz[8][8], int i, int j)
{
srand (time (NULL));
for (i=0;i<8;i++)
{
for (j=0;j<8;j++)
{
matriz[i][j]=rand()%7+1;
}
}
}
//___________________________________________________
void check_matrix(int matriz[8][8], int i, int j)
{
     for (i=0;i<8;i++)
         {
             for (j=0;j<8;j++)
           {    
               while (matriz[i][j] == matriz[i+1][j] && matriz[i+1][j] == matriz [i+2][j] || matriz [i][j] == matriz [i][j+1] && matriz [i][j+2])
               {
               matriz[i][j]=rand()%7+1;
               }
           }
     }
}
//___________________________________________________
void print_matrix (int matriz[8][8], int i, int j)
{
for (i = 0; i < 8 ; i++)
{
for (j=0;j<8;j++)
{
printf("%d ", matriz[i][j]);
}
printf ("\n");
}
}
//___________________________________________________
void change_position(int matriz[8][8], int i, int j)
{
printf ("Select the line. ");
scanf ("%d", &i);
printf ("Select the column. ");
scanf ("%d", &j);
}
//___________________________________________________
int main()
{
int matriz[8][8], i=0, j=0;
create_matrix (matriz, i, j);
check_matrix (matriz, i, j);
print_matrix (matriz, i, j);
change_position (matriz, i, j);
printf ("\n");
system ("pause");
return 0;
}

Answer 1

Looks like print_matrix just above change_position is missing one more closing brace