# re: 將16進制字符串轉換成10進制數 2011-07-13 10:26 xuorc1986

int hexstr2dec(const char* str)
{
int result = 0;
int decnum = 0;
int i = 0;
int length = strlen(str);

do
{
if(str[i]<='9'&&str[i]>='0')
decnum=str[i]-'0';
else if(str[i]<='f'&&str[i]>='a')
decnum=str[i]-'a'+10;
else if(str[i]<='F'&&str[i]>='A')
decnum=str[i]-'A'+10;
else{
return result;
}
result <<= (i << 2);
result += decnum;

} while (i++ < length);

return result;
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