c++ program for hexadecimal to integer conversion?

Answer 1

int HexToInt(char * pString)
{
int result = 0;
while (*pString)
{
result <<= 4;
if ( (*pString >= '0') && (*pString <= '9'))
result += (*pString - '0');
else if ( (*pString >= 'A') && (*pString <= 'F'))
result += (*pString - 'A' + 10);
else if ( (*pString >= 'a') && (*pString <= 'f'))
result += (*pString - 'a' + 10);
pString++;
}
return result;
}

Answer 2

cout << dec << 0x25 ;