Hex2Dec!!!

Hi All,
Is there any built-in function to convert an Hexadecimal value to Decimal value(Integer,not float)and viceversa. OR is there any easy way of doing it.---- But I want it to work for a wide range of values.

The Exact problem is --- I have an application where the user is asked to type a value and this value is the input to my function. Here I am using an Edit Box to get the input--- and the input to my function must be a hexa value.

--To be precise, If the user types in 20000 in the edit box, and I use GetDlgItemText()function to get the string value and use atol()function to get the integer value. I value I get will be 20000 only and not 20000hexa or not even the decimal value of 20000.

Thanks in Advance...
Vittal

To Vittal

Here is some code that might help.

unsigned long CSomeClass::ToDecimal( CString HexNumber )
{
unsigned long Answer = 0, PrevUnit = 1;

HexNumber.MakeReverse();

for( int i=0; i<HexNumber.GetLength(); i++ )
{
switch( HexNumber.GetAt[i] )
{
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9: Answer += (HexNumber.GetAt[i] - '0' * PrevUnit); break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f': Answer += ((HexNumber.GetAt[i] - ('a'-10)) * PrevUnit); break;
}
PrevUnit *= 16;
}

return Answer;
}

Matthew Cross

use strtol.bool HexToDecimal (char* HexNumber, int& Number)
{
char* pStopString;
Number = strtol (HexNumber, &pStopString, 16);
return (bool)(Number != LONG_MAX);
}

HTH
--michael