Borderou de evaluare (job #292956)

Compilare: user.cpp: In function 'int main()': user.cpp:20:11: warning: unused variable 'con' [-Wunused-variable] user.cpp:20:19: warning: variable 'nr' set but not used [-Wunused-but-set-variable] user.cpp:18:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:19:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:21:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]