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++) ^ user.cpp:39:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= text.size() - pattern.size(); i++) ^ user.cpp:44:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; j < pattern.size(); j++) ^ user.cpp:50:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == pattern.size()) ^ 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); ^