Compilare: user.c: In function ‘main’: user.c:44:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &m ); ^ user.c:52:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &k ); ^ user.c:56:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d%d%d", &l1, &c1, &l2, &c2, &p ); ^ user.c:78:12: warning: ‘pn’ may be used uninitialized in this function [-Wmaybe-uninitialized] pa = ( l2 - l1 + 1 ) * ( l2 - l1 + 2 ) / 2 - pn; ^