Compilare: user.cpp: In function ‘int main()’: user.cpp:21:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(frec[k]>maxi) ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.in","r",stdin); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.out","w",stdout); ^