delphi 中的move（）和pos（）函数究竟是怎样用的？

Answer 1

procedure Move(const Source; var Dest; Count: Integer);
将Source按字节拷贝到Dest。Count为要拷贝的字节数。
var
A: array[0..1] of Char;
B: array[0..1] of Char;
begin
A[0]:='1';
A[1]:='2';
Move(A, B, SizeOf(B));
end;

function Pos(Substr: string; S: string): Integer;
在S中查找Substr第一次出现的位置。返回0表示在S中没有找到Substr。
var S: string;
begin
S := ' 123.5';
while Pos(' ', S) > 0 do //将S中的空格替换成'0’
S[Pos(' ', S)] := '0';
end;

Answer 2

Move:

Copies bytes from a source to a destination.
Unit
System
Category
miscellaneous routines
Delphi syntax:
procedure Move(const Source; var Dest; Count: Integer);
C++ syntax:
extern PACKAGE void __fastcall Move(const void *Source, void *Dest, int Count);
Description
Move copies Count bytes from Source to Dest. No range checking is performed. Move compensates for overlaps between the source and destination blocks.
Whenever possible, use the global SizeOf function (Delphi) or the sizeof operator (C++) to determine the count.
........................................................
Pos:

Returns the index value of the first character in a specified substring that occurs in a given string.
Unit
System
Category
string handling routines
Delphi syntax:
function Pos(Substr: string; S: string): Integer;
Description
In Delphi, Pos searches for a substring, Substr, in a string, S. Substr and S are string-type expressions.
Pos searches for Substr within S and returns an integer value that is the index of the first character of Substr within S. Pos is case-sensitive. If Substr is not found, Pos returns zero.
The PosEx function is similar to Pos, but provides additional features and can be used in C++ code.

Answer 3

Delphi没有move函数吧？

函数的用法，推荐你去下载一个PDF文档《Delphi函数参考大全》，里面几乎包括了所有常用的函数。

百度可以搜到。