Borderou de evaluare (job #29012)

Compilare: user.cpp: In function 'int main()': user.cpp:6:29: warning: unused variable 'p' [-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:7:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:21:13: warning: 'z' may be used uninitialized in this function [-Wuninitialized] user.cpp:13:9: warning: 'a' may be used uninitialized in this function [-Wuninitialized]