Borderou de evaluare (job #67778)

Compilare: user.cpp: In function ‘int main()’: user.cpp:5:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:14:3: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] user.cpp:23:17: warning: ‘x’ may be used uninitialized in this function [-Wuninitialized] user.cpp:24:8: warning: ‘a’ may be used uninitialized in this function [-Wuninitialized]