Compilare: user.cpp:5:1: warning: multi-line comment user.cpp: In function ‘bool prim(long int)’: user.cpp:16: warning: unused variable ‘j’ user.cpp: In function ‘long int nrdivf(long int)’: user.cpp:38: warning: statement has no effect user.cpp:25: warning: unused variable ‘j’ user.cpp: In function ‘int main()’: user.cpp:43: warning: unused variable ‘j’ user.cpp:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result