Delphi 中 & 符号有什么作用

[bingying19872008]

BOOL WINAPI EnumProcesses(
DWORD* pProcessIds,
DWORD cb,
DWORD* pBytesReturned
);

delphi 中
这样
EnumProcesses(aProcesses,Sizeof(aProcesses),&DWcbNeeded) 编译器没报错(因为是直接复制的，&在C++中是取内存地址)
后查看delphi中EnumProcesses声明为
EnumProcesses(lpidProcess: LPDWORD; cb: DWORD; var cbNeeded: DWORD)

于是改成了EnumProcesses(aProcesses,Sizeof(aProcesses),DWcbNeeded)
也能正常运行...我在网上搜了下，没发现 Delphi 中 & 符号的作用,所以来请教一下

[bdmh]

delphi取地址是 @

[bingying19872008]

是的 delphi 取地址是@. 但是用 & 编译器没报错。
既然编译器没报错，所以我很想知道& 到底是干嘛的，delphi 应该没这个符号

[milunhailili]

快捷键啊.

[bingying19872008]

ok 结贴!

[bingying19872008]

EnumProcesses(aProcesses,Sizeof(aProcesses),&DWcbNeeded)
但是在代码中&符号肯定不是快捷键吧。 你也可以试试在代码中传入&符号。编译器不报错的

[猴子先生大宝贝]

Reserved words always take precedence over user-defined identifiers. For example,

var
Ch: Char;
...
asm
MOV CH, 1
end;

loads 1 into the CH register, not into the Ch variable. To access a user-defined symbol with the same name as a reserved word, you must use the ampersand (&) override operator:

MOV &Ch, 1

It is best to avoid user-defined identifiers with the same names as built-in assembler reserved words.

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