Borderou de evaluare (job #33892)

Compilare: user.cpp: In function ‘int main()’: user.cpp:6:16: warning: unused variable ‘a’ [-Wunused-variable] user.cpp:6:18: warning: unused variable ‘nc’ [-Wunused-variable] user.cpp:6:21: warning: variable ‘cn’ set but not used [-Wunused-but-set-variable] user.cpp:4:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:5:41: 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]