Compilare: user.cpp: In function ‘void read()’: user.cpp:35:37: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘double*’ [-Wformat=] scanf("%d %d %d", &x, &y, &z); ^ user.cpp:32:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &V, &E); ^ user.cpp:35:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &x, &y, &z); ^