Borderou de evaluare (job #172651)

Compilare: user.cpp: In function ‘int main()’: user.cpp:7:11: warning: unused variable ‘k’ [-Wunused-variable] user.cpp:7:13: warning: variable ‘a2’ set but not used [-Wunused-but-set-variable] user.cpp:5:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]