Compilare: main.c: In function 'bubblesort': main.c:52:10: warning: unused variable 'i' [-Wunused-variable] i; ^ main.c: In function 'main': main.c:131:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:132:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT, "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:134:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^~~~~~~~~~~~~~~ main.c:139:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &elem); ^~~~~~~~~~~~~~~~~~~