Compilare: user.cpp: In function ‘int main()’: user.cpp:83:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < A.size() - 1; ++i) { ^ user.cpp:91:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = A.size() - 1; i < B.size(); ++i) ^ user.cpp:69:37: 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:70:39: 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); ^