Compilare: user.c: In function ‘main’: user.c:59:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r", stdin); ^ user.c:61:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT, "w", stdout); ^ user.c:63:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.c:67:28: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for(i = 0; i < n; ++i) scanf("%d", &v[ i ]); ^ user.c: In function ‘combsort’: user.c:32:21: warning: ‘swapped’ may be used uninitialized in this function [-Wmaybe-uninitialized] while( gap > 1 || swapped ) { ^