Borderou de evaluare (job #230727)

Compilare: user.cpp: In function ‘int main()’: user.cpp:26:18: warning: null argument where non-null required (argument 1) [-Wnonnull] user.cpp:5:17: warning: unused variable ‘cont’ [-Wunused-variable] 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:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]