HIWORD

• 来源: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgHiword
• 最后更新: 2022-11-04

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获取操作数的第二个16位字。

语法

#define Hiword( expr ) ((Cast(Uinteger, expr) and &hFFFF0000) shr 16)

用法

result = Hiword( expr )

参数

expr

数值表达式，转换为 Uinteger 值。

返回值

返回 expr 低32位双字的高16位字值。

说明

该宏将数值表达式 expr 转换为 Uinteger 值，然后展开为表示其第二个16位字值的 Uinteger——即 expr 最低有效（低）32位双字的最高有效（高）16位字。

示例

start GeSHi

Dim N As UInteger

'Note there are 32 bits
N = &b10000000000000011111111111111111

Print "N is                                       "; N
Print "The binary representation of N is          "; Bin(N)
Print "The most significant word (MSW) of N is    "; HiWord(N)
Print "The least significant word (LSW) of N is   "; LoWord(N)
Print "The binary representation of the MSW is    "; Bin(HiWord(N))
Print "The binary representation of the LSW is    "; Bin(LoWord(N))

Sleep

end GeSHi

输出结果如下：

N Is                                       2147614719
The Binary representation of N Is          10000000000000011111111111111111
The most significant word (MSW) of N Is    32769
The least significant word (LSW) of N Is   65535
The Binary representation of the MSW Is    1000000000000001
The Binary representation of the LSW Is    1111111111111111

方言差异

• 在 -lang qb 方言中不可用，除非使用别名 __HIWORD 引用。

与 QB 的差异

• FreeBASIC 新增

另请参阅

• Lobyte
• Hibyte
• Loword

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