Borderou de evaluare (job #507081)

Eroare de compilare: user.cpp: In function 'int main()': user.cpp:32:27: error: 'memset' was not declared in this scope user.cpp:40:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:25:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:26:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:28:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:31:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]