Compilare: user.cpp: In function ‘int main()’: user.cpp:53:9: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable] int dummy; ^ user.cpp:65:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &G); ^ user.cpp:66:67: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d\n", &x1, &y1, &z1, &x2, &y2, &z2); ^