Compilare: user.cpp: In function ‘char pick(int)’: user.cpp:28:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] SKIP(f[x] == 0); ^ user.cpp:9:20: note: in definition of macro ‘SKIP’ #define SKIP(x) if(x) { continue; } ^ user.cpp: In function ‘int main()’: user.cpp:44:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++f[*i]; ^ user.cpp:52:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] --f[x]; ^ user.cpp:35:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(InFile, "r", stdin); ^ user.cpp:36:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(OuFile, "w", stdout); ^ user.cpp:38:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); getchar(); ^ user.cpp:40:32: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(buf, MAXN, stdin); ^