créer dynamiquement la matrice C
int **A = (int **)malloc(N * sizeof(int*));
for(i=0; i<N; i++){
A[i] = (int *)malloc(N * sizeof(int));
}
Marton
int **A = (int **)malloc(N * sizeof(int*));
for(i=0; i<N; i++){
A[i] = (int *)malloc(N * sizeof(int));
}