Compilare: user.cpp: In function ‘int main()’: user.cpp:46:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fals.size(); i++) ^ user.cpp:52:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ch.size(); i++) ^ user.cpp:15:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paritate.in","r",stdin); ^ user.cpp:16:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paritate.out","w",stdout); ^ user.cpp:18:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S); ^ /tmp/ccQD5Fat.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.