Question

Hello
I have a string parser who receives as its input a hex number:
For Example:
String X=”0x120005f38″

As you can see the number is in HEX, how do I convert this to unsigned long?

If this was decimal based string I could use the string to unsigned long function.
I am guessing there are a couple of steps, and I am not sure what order or functions to use.
1)Where I need to convert Hex into decimal
2)and String into unsigned long.

This seems very tricky to me, any ideas?

Answer 1

Use strtoul:

strtoul("0x120005f3", 0, 0);

strtoul reference on cplusplus.com. See how that works on Codepad.

EDIT: Changed to strtoul, did not notice that unsigned long is required.