Borderou de evaluare (job #30423)

Compilare: user.cpp: In function ‘int main()’: user.cpp:6:9: warning: unused variable ‘f’ [-Wunused-variable] user.cpp:6:31: warning: unused variable ‘z’ [-Wunused-variable] user.cpp:4:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:5:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]