Compilare: user.c: In function ‘main’: user.c:18:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d%d%d", &n, &m, &k ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:19:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d%d%d%d", &x1, &y1, &x2, &y2 ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:23:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &parc[l][c] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~