#include <stdio.h>

/********************* trace *********************/
void printMatTrace(int mat[2][3], int nbLignes, int nbCols)
{
 int l,c;

 printf("{");
 for(l=0;l<=nbLignes-1;l=l+1)
 {
  printf("{");
  for(c=0;c<=nbCols-1;c=c+1)
  {
   if (c!=nbCols-1) { printf("%d ",mat[l][c]); }
   else             { printf("%d", mat[l][c]); }
  }
  printf("}");
 }
 printf("}");
}
/***/
void trace(int l, int c, int mat1[2][3], int mat2[2][3],
           int nbLignes, int nbCols)
{
 printf(" %d ",l);

 printf(" %d ",c);

 printMatTrace(mat1,nbLignes,nbCols);

 printf(" ");

 printMatTrace(mat2,nbLignes,nbCols);

 printf("\n");
}
/******************* fin trace *******************/

int main(void)
{
 int mat1[2][3] = { {10, 20, 30} , {40, 50, 60} };
 int mat2[2][3];
 int nbLignes = 2, nbCols = 3;
 int l,c;

 for(l=0;l<=nbLignes-1;l=l+1)
 {
  for(c=0;c<=nbCols-1;c=c+1)
  {
   mat2[l][c] = mat1[l][c]/10;
   /* trace(l,c,mat1,mat2,nbLignes,nbCols); */
  }
 }

 return 0;
}