How to convert a Hex string to an integer value in C++?

I have been trying to figure this out for a while now, is there any way to convert from a Hex string to an integer value in C++?


For example:


string hexstring = "100C";


needs to be converted to the integer equvalent.


I know how to convert a hex to int but not string hex to int.





But...I would really rather have it just be used as a hex value if there is someway to convert this string to a hex number that would be best. Because what I really need to do is to mimic some memory with hexadecimal values. I'm using an array to mimic memory, is there any way I can use hex values as indexes to places in my array? Anyways, if anyone can help me on this I would greatly appreciate it. Thanks.

How to convert a Hex string to an integer value in C++?
There are a number of ways to do this, one I am suggesting may or may not be one of the most optimal but is easy:





#include %26lt;iostream%26gt;


#include %26lt;string%26gt;


using namespace std;


int main()


{


string hex = "100C";


int decimalValue = 0;





sscanf(hex.c_str(), "%x", %26amp;decimalValue);


cout%26lt;%26lt;decimalValue%26lt;%26lt;endl;


return 0;


}





Else you know the algo and that hex is base 16, write your own function.