A. 流计算 B. 图计算 C. 批处理计算 D. 查询计算
A. struct xyz{char x;int y;float z;};struct xyz a; B. struct xyz{char x;int y;float z;} a; C. struct xyz{char x;int y;float z;};typedef xyz a; D. struct {char x;int y;float z;} a;