how to do an inverse of a matrix using gauss elimination algorithm?

[Unregistered]

I already doing it but I need a lot of help.

thanks

[QuestionC]

I figure you're gonna need a lot of functions that perform row-wise operations. Some rough code

int main ()
{
 int * m, * identity;
 int aspect, i, temp;

 getMatrix (&m, &aspect);
 makeIdentity (&identity, aspect);

 // Now we have 2 matrices.  Let's do the math...

 for (i = 0; i < aspect; i++)
 {
  // Selects a row such that the ith element of the row is not 0
  j = getithRow (m);
  /* Example, performed on matrix:
   0 5 6
   3 4 5
   2 3 5
   will return 1... */

  if (j != i)
  {
   // Anything we do to one matrix, we do to the other.
   swapRows (m, j, i);
   swapRows (identity, j, i);
  }
  /* 3 4 5   0 1 0
     0 5 6   1 0 0
     2 3 5   0 0 1 */

  temp = m[i][i];
  divideRow (m, i, temp);
  divideRow (identity, i, temp);
  /* 1 1.33 1.67       0    0  .33
     0    5    6       1    0    0 
     2    3    5       0    1    0 */
  
  for (j = 0; j < aspect; j++)
  {
   temp = m[j][i];
   // This function does a lot, it subtracts 
   //   from row j, row i's values times temp.
   subRow (m, j, i, temp);
  }
  /* 1 1.33 1.67       0    0  .33
     0    5    6       1    0    0 
     0  .33 1.67       0    1  .66 */
 }  // Then you move on to the next row.
 return 0;
}

In addition to needing the functions, the code I posted will not work, but it should get the idea across (and it takes very little modification to repair).