Compilare: user.cpp: In function ‘int main()’: user.cpp:105:9: warning: variable ‘D’ set but not used [-Wunused-but-set-variable] int D = 0; ^ user.cpp: In function ‘void read()’: user.cpp:19:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:24:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &z); ^