Compilare: user.c: In function ‘main’: user.c:45:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d%d", &n, &m, &pl, &pc, &cl, &cc); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:48:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[x][y]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~