动态数组做为方法参数时,任何设置默认值?(50分)

C

Cloud0

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• 2006-01-13

• #1

动态数组做为方法参数时,任何设置默认值?
如:
function mmmm(bb: array of string = ????):string;
bb数组的默认值怎么写?

 

T

terryapp

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• 2006-01-13

• #2

程序里面赋初值。

 

T

tseug

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• 2006-01-13

• #3

type
TStrArray = array of string;

function mm(bb: TStrArray = nil):string;
begin
end;

 

C

Cloud0

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• 2006-01-13

• #4

答案不是很满意,再顶一下.
只要数组的默认值是nil就可以了!

 

D

delphisuccess

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• 2006-01-13

• #5

這個得用遍厲方法其各個成員值初始化為nil.
function mm(bb: TStrArray = nil):string;
begin
end;
只是首個成員為nil，其它沒有初始化為nil

 

X

Xine

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• 2006-01-13

• #6

动态数组没有初始化,默认值就已经是nil


无需再赋值的

如果要重新赋值就按 delphisuccess 说的
先定义 TStrArray 类型
type
TStrArray = array of string;

再初始化
function mm(bb: TStrArray = nil):string;
begin
end;

 

B

Beyondbill

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• 2006-01-13

• #7

Default parameters are limited to values that can be specified by a constant expression. Hence parameters of a dynamic-array, procedural, class, class-reference, or interface type can have no value other than nil as their default. Parameters of a record, variant, file, static-array, or object type cannot have default values at all.

参见上面Delphi的帮助就知道，动态数组好像只能有nil的缺省值

 

K

kaoleoloi

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• 2006-02-11

• #8

帮顶！

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