Compilare: user.cpp: In function ‘void Insert()’: user.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x; scanf("%d", &x); ^ user.cpp: In function ‘void Erase()’: user.cpp:31:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int index; scanf("%d", &index); ^ user.cpp: In function ‘void Query()’: user.cpp:40:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x, k; scanf("%d%d", &x, &k); ^ user.cpp: In function ‘int main()’: user.cpp:53:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d", &operation_count); operation_count > 0; operation_count--) { ^ user.cpp:54:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int type; scanf("%d", &type); ^