delphi到C++构建器的转换

Question

我在Delphi中有源代码我按照http://hscripts.com/tutorials/cpp/bitwise-operators.php为按位运算符在C++ Builder中转换它,但结果是不同的

Delphi中的源代码

procedure TForm1.Button1Click(Sender: TObject)
var
    tmp, dynamicINT : integer;
begin
    dynamicINT := 42080;
    tmp := ((dynamicINT shl 1) or (dynamicINT shr 31) and $7FFFFFFF);

    Edit1.Text := IntToHex(tmp, 4);
end;

德尔福结果:148C0正确!

C++ Builder中的源代码

void __fasctall TForm1::Button1Click(TObject *Sender)
{
    int tmp = 0;
    int dynamicINT = 42080;

    tmp = ((dynamicINT << 1) || (dynamicINT >> 31) && 0x7FFFFFFF);
    Edit1->Text = IntToHex(tmp, 4);
}

C++ Builder结果:0001???

转换有什么问题？

我正在使用C++ Builder 6和Delphi 7

Answer 1

||并且&&是C++中的逻辑运算符,而不是按位运算符.它们只返回true/false.相应的二元运算符是|和&.

尝试:

tmp = ((dynamicINT << 1) | (dynamicINT >> 31) & 0x7FFFFFFF);