Compilare: user.cpp: In function ‘void make_anagrams(std::__cxx11::string, int, int)’: user.cpp:17:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < word.size(); i++) { ~~^~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:39:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("laundering.in", "r", stdin); ^ user.cpp:40:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("laundering.out", "w", stdout); ^