--从键盘输入一个数 accept b prompt '请输入一个大于零的数字'; declare anum number := &b; begin loop dbms_output.put_line(anum); anum:; end loop; end; declare v_num number; begin -- 从stsu表中选出id最大的值,并根据该值打印次数 select max(id) into v_num from stsu; loop dbms_output.put_line(
1.16 TO 10 ******************************************************** 16转10,否则输出-1 function Hex(c: char): Integer;var x: Integer;begin if ( Ord(c)>= Ord('0')) and (Ord(c) <= Ord('9')) then x:= Ord(c) - Ord('0') else if (Ord(c) >= Ord('a')) an
An interface type is defined by a set of methods. A value of interface type can hold any value that implements those methods. Note: The code on the left fails to compile. Vertex doesn't satisfy Abser because the Abs method is defined only on*Vertex,
Methods can be associated with a named type or a pointer to a named type. We just saw two Abs methods. One on the *Vertex pointer type and the other on the MyFloat value type. There are two reasons to use a pointer receiver. First, to avoid copying t
In fact, you can define a method on any type you define in your package, not just structs. You cannot define a method on a type from another package, or on a basic type. package main import ( "fmt" "math" ) type MyFloat float64 func (f
Go does not have classes. However, you can define methods on struct types. The method receiver appears in its own argument list between the func keyword and the method name. package main import ( "fmt" "math" ) type Vertex struct { X,
