Compilare: user.cpp: In function ‘int main()’: user.cpp:24:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < pattern.size(); i++) ^ user.cpp:30:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < pattern.size() && i < text.size(); i++) ^ user.cpp:30:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < pattern.size() && i < text.size(); i++) ^ user.cpp:15:39: 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:16:41: 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); ^