Borderou de evaluare (job #481895)

Compilare: user.cpp: In function 'int main()': user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:24:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:38:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:11:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:13:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:15:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]