我写了一个active,在add method
假设我现在要返回一个BYTE形的,
(0x01 0x02 0x88 0x99 ...)
怎么样返回这样的一个16进制
我想可以作为一串字符串,但我在add method时,
在return type 中不知道 返回哪一个
要怎么做呢,
谢谢了
假设我现在要返回一个BYTE形的,
(0x01 0x02 0x88 0x99 ...)
怎么样返回这样的一个16进制
我想可以作为一串字符串,但我在add method时,
在return type 中不知道 返回哪一个
要怎么做呢,
谢谢了
通过参数取出来。
ReadStr = SerialPort.Read();
SerialPort.PortClose();
if((ReadStr.GetLength() > 7) && (ReadStr[6] == 0x08))return .......;
else
return .......;
这我要读出ReadStr[7]以后的值,我知道ReadStr[7]的值是0x88,以及ReadStr[8]以后和
在return type 中,只有那几种类型
我要用哪一个
{
CString ReadStr;
ReadStr = SerialPort.Read();
SerialPort.PortClose();return ReadStr.Mid(7);//或者为6,8
}
在但我在add method时,
在return type 中,没有char*
(还是我不知道 :( )
还有
error C2109: subscript requires array or pointer type我是菜鸟呵
{
CString ReadStr=_T("ajsdfasjoerewjrekw");
BYTE *pbStr;
//ReadStr = SerialPort.Read();
//SerialPort.PortClose();
UINT nLen=ReadStr.GetLength();
pbStr=new BYTE[nLen-7];
memcpy((void *)pbStr,(void *)(LPCTSTR)ReadStr.Mid(7),nLen-7);
return pbStr;
}
不知道这样行不行!
它里面 的东西 是:0x88 0x99 0x2C 0x1C 0xAA
我要怎么把它读出,而在active中add method,没有什么*呀 :)
在调试active时返回值,要么是10进制的,要么就是乱码
我不知道,还请大家指教
到MSDN中找Format吧
TCHAR GetAt( int nIndex ) const;Return ValueA TCHAR containing the character at the specified position in the string.ParametersnIndexZero-based index of the character in the CString object. The nIndex parameter must be greater than or equal to 0 and less than the value returned by GetLength. The Debug version of the Microsoft Foundation Class Library validates the bounds of nIndex; the Release version does not.ResYou can think of a CString object as an array of characters. The GetAt member function returns a single character specified by an index number. The overloaded subscript ([]) operator is a convenient alias for GetAt.ExampleThe following example demonstrates the use of CString::GetAt.// example for CString::GetAt
CString s( "abcdef" );
ASSERT( s.GetAt(2) == 'c' );CString Overview | Class Members | Hierarchy ChartSee Also CString::GetAt, CString::GetLength, CString::operator []
TCHAR operator []( int nIndex ) const;ParametersnIndexZero-based index of a character in the string.ResYou can think of a CString object as an array of characters. The overloaded subscript ([]) operator returns a single character specified by the zero-based index in nIndex. This operator is a convenient substitute for the GetAt member function.Important You can use the subscript ([]) operator to get the value of a character in a CString, but you cannot use it to change the value of a character in a CString.ExampleThe following example demonstrates the use of CString::operator [ ].// example for CString::operator [ ]
CString s( "abc" );
ASSERT( s[1] == 'b' );CString Overview | Class Members | Hierarchy ChartSee Also CString::GetAt, CString::SetAt
我要怎么做,这是给别人做二次开发用的
如果我的这个函数没有返回值,我可以设置一个成员变量去得到它们吗?
二次开发直接调用这个成员变量就可以了吗?请大家说说一说呵
谢谢了
别人在做二次开发时,只是拿你的值和0xAA比较,
在机器中它们是相等170的呀
你只返回170就可以了我想是这样的
CString mstr;
CString out = "";
int x = ReadStr.GetLength();
for( int i = 0; i < x; ++i )
{
mstr.Format(" 0X%02X ",ReadStr.GetAt(i));
out += mstr;
}
结果是 输出 out 为 0x31 0x32 0x33 0x34 0x35