Compilare: user.cpp: In function ‘void prefix()’: user.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(ss);i++) ^ user.cpp: In function ‘void cautare()’: user.cpp:58:39: 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); ^