Borderou de evaluare (job #170920)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:22:6: error: ‘pp’ was not declared in this scope user.cpp:23:6: error: ‘t’ was not declared in this scope user.cpp:23:8: error: ‘y’ was not declared in this scope user.cpp:23:10: error: ‘u’ was not declared in this scope user.cpp:7:10: warning: unused variable ‘a’ [-Wunused-variable] user.cpp:7:12: warning: unused variable ‘b’ [-Wunused-variable] user.cpp:8:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:9:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:15:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]