Borderou de evaluare (job #7325)

Compilare: user.cpp: In function ‘int main()’: user.cpp:7:12: warning: unused variable ‘a’ [-Wunused-variable] user.cpp:7:14: warning: unused variable ‘b’ [-Wunused-variable] user.cpp:7:16: warning: unused variable ‘ca’ [-Wunused-variable] user.cpp:7:19: warning: unused variable ‘cb’ [-Wunused-variable] user.cpp:7:22: warning: unused variable ‘i’ [-Wunused-variable] user.cpp:7:24: warning: unused variable ‘j’ [-Wunused-variable] user.cpp:7:26: warning: unused variable ‘nr’ [-Wunused-variable] user.cpp:7:31: warning: unused variable ‘t’ [-Wunused-variable] user.cpp:5:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:9:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]