Compilare: user.cpp: In function ‘int egal(int)’: user.cpp:15:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l1!=v[poz].size()) return 0; ^ user.cpp: In function ‘int main()’: user.cpp:32:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.in","r",stdin); ^ user.cpp:33:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.out","w",stdout); ^ user.cpp:37:20: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(sir+1); ^ user.cpp:38:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ /tmp/cc0zlBf8.o: In function `main': user.cpp:(.text.startup+0x7d): warning: the `gets' function is dangerous and should not be used.