Compilare: user.cpp: In function ‘int nrdiv(int)’: user.cpp:30: warning: unused variable ‘lim’ user.cpp: In function ‘int main()’: user.cpp:53: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:54: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:59: warning: ‘min’ may be used uninitialized in this function user.cpp:59: warning: ‘nr’ may be used uninitialized in this function