Compilare: user.c: In function ‘qsort’: user.c:31:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.c: In function ‘cit’: user.c:44:29: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] if (pz == dim) fread(ax, 1, dim, stdin), pz = 0; ^ user.c:48:29: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] if (pz == dim) fread(ax, 1, dim, stdin), pz = 0; ^ user.c: In function ‘main’: user.c:54:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("easychoice.in", "r", stdin); ^ user.c:55:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("easychoice.out", "w", stdout); ^