Borderou de evaluare (job #48810)

Compilare: user.cpp: In function ‘int main()’: user.cpp:32:31: warning: operation on ‘j’ may be undefined [-Wsequence-point] user.cpp:8:27: warning: unused variable ‘nr’ [-Wunused-variable] user.cpp:6:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:9:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]