Compilare: user.cpp: In function ‘void build_table(std::string)’: user.cpp:14:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos < word.length()) ^ user.cpp: In function ‘void kmp_search(std::string, std::string)’: user.cpp:53:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (matchPos + wordPos < text.length()) ^ user.cpp:58:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (wordPos == word.length() - 1) ^ user.cpp: In function ‘int main()’: user.cpp:82:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in", "r", stdin); ^ user.cpp:83:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w", stdout); ^