Compilare: user.c: In function ‘main’: user.c:15:2: warning: statement with no effect [-Wunused-value] for (i; i < n; i++){ ^ user.c:22:2: warning: statement with no effect [-Wunused-value] for (k; k < m / 2 + 1 ; k++){ ^ user.c:13:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^ user.c:17:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &a[i][j]); ^