Compilare: user.cpp: In function ‘int main()’: user.cpp:23:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long int j=0;j<temp.length();j++)if(temp[j]=='1') ^ user.cpp:14:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kbiti.in","r",stdin); ^ user.cpp:15:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kbiti.out","w",stdout); ^