Compilare: user.cpp: In function ‘int main()’: user.cpp:13:27: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[10005]’ [-Wformat=] scanf("%d\n%s", &n, &s); ^ user.cpp:20:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++ f[s[i]]; ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("litere.in", "r", stdin); ^ user.cpp:10:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("litere.out", "w", stdout); ^ user.cpp:13:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%s", &n, &s); ^