Borderou de evaluare (job #28891)

Compilare: user.cpp: In function ‘int main()’: user.cpp:10:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] user.cpp:6:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:21: warning: ‘nr’ may be used uninitialized in this function [-Wuninitialized] user.cpp:11:13: warning: ‘ok’ may be used uninitialized in this function [-Wuninitialized]