Compilare: user.cpp:14: warning: integer constant is too large for ‘long’ type user.cpp: In function ‘int main()’: user.cpp:36: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:21: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result