Borderou de evaluare (job #487527)

Compilare: user.cpp: In function 'int main()': user.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:7:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]