Borderou de evaluare (job #10151)

Compilare: user.cpp: In function 'int main()': user.cpp:14:21: warning: statement has no effect [-Wunused-value] user.cpp:7:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:30:24: warning: 'i' may be used uninitialized in this function [-Wuninitialized]