Borderou de evaluare (job #7828)

Compilare: user.cpp: In function ‘int main()’: user.cpp:13:11: warning: unused variable ‘a’ [-Wunused-variable] user.cpp:13:13: warning: unused variable ‘b’ [-Wunused-variable] user.cpp:13:15: warning: unused variable ‘ca’ [-Wunused-variable] user.cpp:13:18: warning: unused variable ‘cb’ [-Wunused-variable] user.cpp:13:21: warning: unused variable ‘i’ [-Wunused-variable] user.cpp:13:23: warning: unused variable ‘j’ [-Wunused-variable] user.cpp:13:25: warning: unused variable ‘nr’ [-Wunused-variable] user.cpp:13:30: warning: unused variable ‘t’ [-Wunused-variable] 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:11:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:15:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:17:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]