Compilare: user.cpp: In function ‘int main()’: user.cpp:15:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &Z); ^ user.cpp:19:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(v + 1, MAXN + 2, fin); ^