Compilare: user.cpp: In function ‘int main()’: user.cpp:53:8: warning: statement is a reference, not call, to function ‘fclose’ [-Waddress] fclose; ^ user.cpp:53:8: warning: statement has no effect [-Wunused-value] user.cpp:31:7: warning: variable ‘active’ set but not used [-Wunused-but-set-variable] bool active = false; ^ user.cpp:17:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file, "%ld", &N); ^ user.cpp:27:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file, "%ld", &vector[i]); ^