//將進制的一個字符轉換爲十進制的數
unsigned char CDushujuDlg::BtoH(char ch)
{
//0-9
if (ch >= '0' && ch <= '9')
return (ch - '0');
//9-15
if (ch >= 'A' && ch <= 'F')
return (ch - 'A' + 0xA);
//9-15
if (ch >= 'a' && ch <= 'f')
return (ch - 'a' + 0xA);
return(255);
}
//轉換十進制數
void CDushujuDlg::OnDecimalConv()
{
UpdateData(TRUE);
//先轉換爲二進制
m_strBinary = DecimalToBinary(m_strDecimal);
//再轉換爲十六進制
m_strHex = BinaryToHex(m_strBinary);
UpdateData(FALSE);
}
//轉換二進制數
void CDushujuDlg::OnBinaryConv()
{
UpdateData(TRUE);
//轉換爲十進制
m_strDecimal = BinaryToDecimal(m_strBinary);
//轉換爲十六進制
m_strHex = BinaryToHex(m_strBinary);
UpdateData(FALSE);
}
//轉換十六進制數
void CDushujuDlg::OnHexConv()
{
UpdateData(TRUE);
//先轉換爲二進制
m_strBinary = HexToBinary(m_strHex);
//再轉換爲十進制
m_strDecimal = BinaryToDecimal(m_strBinary);
UpdateData(FALSE);
}
//轉換十六進制爲二進制
CString CDushujuDlg::HexToBinary(CString strHex)
{
int nLenth = strHex.GetLength();
char* Hex = new char[nLenth];
Hex = strHex.GetBuffer(0);
CString strBinary = _T("");
for(int i=0;i<nLenth;i++)
{
//轉換一位十六進制數爲十進制
char h = Hex[nLenth - 1 - i];
int j = BtoH(h);
CString str;
str.Format(_T("%d"),j);
//轉換十進制爲爲二進制
str = DecimalToBinary(str);
strBinary += str;
}
return strBinary;
}
//轉換二進制爲十六進制
CString CDushujuDlg::BinaryToHex(CString strBinary)
{
int nLength = strBinary.GetLength();
CString str = strBinary;
//位數不是四的倍數時補齊
switch (nLength % 4)
{
case 0:
break;
case 1:
strBinary.Format(_T("%d%d%d%s"), 0, 0, 0, str);
break;
case 2:
strBinary.Format(_T("%d%d%s"), 0, 0, str);
break;
case 3:
strBinary.Format(_T("%d%s"), 0, str);
break;
default:
return _T("");
break;
}
CString strHex, str1;
str1 = _T("");
nLength = strBinary.GetLength();
for(int i = 1; i <= (nLength / 4); i++)
{
//每四位二進制數轉換爲一十六進制數
str = strBinary.Left(4);
CString strDecimal = BinaryToDecimal(str);
int nDecimal = atoi(strDecimal.GetBuffer(0));
if (nDecimal < 10)
str1.Format(_T("%d"), nDecimal);
else
{
char c = 'A' + (nDecimal - 10);
str1.Format(_T("%c"), c);
}
strHex += str1;
strBinary = strBinary.Right(strBinary.GetLength() - str.GetLength());
}
return strHex;
}
//轉換十進制爲二進制
CString CDushujuDlg::DecimalToBinary(CString strDecimal)
{
int nDecimal = atoi(strDecimal.GetBuffer(0));
int nYushu; //餘數
int nShang; //商
CString strBinary = _T("");
char buff[2];
CString str = _T("");
BOOL bContinue = TRUE;
while (bContinue)
{
nYushu = nDecimal % 2;
nShang = nDecimal / 2;
sprintf(buff, _T("%d"), nYushu);
str = strBinary;
strBinary.Format(_T("%s%s"), buff, str);
nDecimal = nShang;
if (nShang == 0)
bContinue = FALSE;
}
return strBinary;
}
//轉換二進制爲十進制
CString CDushujuDlg::BinaryToDecimal(CString strBinary)
{
int nLenth = strBinary.GetLength();
char* Binary = new char[nLenth];
Binary = strBinary.GetBuffer(0);
int nDecimal = 0;
for(int i = 0; i < nLenth; i++)
{
char h = Binary[nLenth - 1 - i];
char str[1];
str[0] = h;
int j = atoi(str);
for(int k = 0; k < i; k++)
{
j = j * 2;
}
nDecimal += j;
}
CString strDecimal;
strDecimal.Format(_T("%d"), nDecimal);
return strDecimal;
}
二進制、十進制以及十六進制之間的相互轉換
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