Borderou de evaluare (job #20141)

Compilare: user.cpp: In function 'int main()': user.cpp:8:20: warning: unused variable 'p' [-Wunused-variable] user.cpp:6:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:49:11: warning: 'nr' may be used uninitialized in this function [-Wuninitialized]