Compilare: user.cpp: In function ‘long int prim(long int)’: user.cpp:7: warning: suggest parentheses around comparison in operand of ‘|’ user.cpp: In function ‘int main()’: user.cpp:36: warning: format ‘%d’ expects type ‘int*’, but argument 2 has type ‘long int*’ user.cpp:36: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long int*’ user.cpp:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:62: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result