recherche valeur min dans un tableau ?

void find_min_tw(int col, int a[MAX][MAX],int n,int *min_tw, int *pos_tw)
{
  *min_tw=a[1][col];
  *pos_tw=1;
  int i;
  for(i=1;i<=n;i++)
    if(a[i][col]<*min_tw)
    {
       *min_tw=a[i][col];
       *pos_tw=i;
    }
}

find_min_tw(5,client,n,&min_tw,&pos_tw); // on cherche la fenêtre de temps la plus petite
printf("\n Le client %d a le fdt plus petit, valeur = %d ",pos_tw,min_tw);

void find_min_tw(int a[MAX][6],int n,int *min_tw, int *pos_tw)
{
  *min_tw=a[1][5];
  *pos_tw=1;
  int i;
  for(i=1;i<=n;i++)
    if(a[i][5]<*min_tw)
    {
       *min_tw=a[i][5];
       *pos_tw=i;
    }
    
}