Compilare: user.c: In function ‘main’: user.c:29:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&n); ^ user.c:36:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d ",&v[i]); ^ user.c:55:2: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = 1; i <= dr; i++) { ^ user.c:11:13: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] med = (st + dr) / 2; ^ user.c:24:12: note: ‘st’ was declared here int n, i, st, dr, aux; ^