Compilare: main.c: In function 'main': main.c:10:17: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] #define IronmaN freopen ^ main.c:56:5: note: in expansion of macro 'IronmaN' IronmaN iron1 FIN, "r", stdin iron2 end ^~~~~~~ main.c:5:17: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] #define perlego scanf ^ main.c:58:5: note: in expansion of macro 'perlego' perlego("%d", &n)end ^~~~~~~ main.c:5:17: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] #define perlego scanf ^ main.c:62:50: note: in expansion of macro 'perlego' ironman iron1 i eq 0 end i < n end ++i iron2 perlego("%d", (p + i))end ^~~~~~~ main.c: In function '_cs': main.c:24:25: warning: 'swapped' may be used uninitialized in this function [-Wmaybe-uninitialized] while iron1 gap > 1 || swapped iron2 begin ^~