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For example: FF = 255<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; F = 15<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; E = 14<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D = 13<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C = 12<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; B = 11<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; A = 10<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 9 = 9<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 8 = 8<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 7 = 7<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 6 = 6<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 5 = 5<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 4 = 4<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3 = 3<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2 = 2<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1 = 1<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0 = 0<br />
&nbsp; &nbsp; &nbsp;
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For example: FF = 255
              F = 15
              E = 14
              D = 13
              C = 12
              B = 11
              A = 10
              9 = 9
              8 = 8
              7 = 7
              6 = 6
              5 = 5
              4 = 4
              3 = 3
              2 = 2
              1 = 1
              0 = 0
     

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Or, use 'strtol()':<br />
<br />
#include &lt;stdlib.h&gt;<br />
<br />
char* pcHex =&quot;0xff&quot;; <br />
char* pcCnvEnd; <br />
int &nbsp; n;<br />
<br />
&nbsp; n = (int) strtol ( pszHex, &amp;pcCnvEnd, 16); // &lt;-- numeric base!! <br />
<br />
Feel free to ask if you need more information!<br />

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Or, use 'strtol()':

#include <stdlib.h>

char* pcHex ="0xff";
char* pcCnvEnd;
int   n;

  n = (int) strtol ( pszHex, &pcCnvEnd, 16); // <-- numeric base!!

Feel free to ask if you need more information!


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Thanks alot -- works wonders
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<div class="content wysiwyg-content">
How do I convert from a hexadecimal string to an integer??? &nbsp;I am using the g++ compiler under unix.
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How do I convert from a hexadecimal string to an integer???  I am using the g++ compiler under unix.

Hexadecimal Strings

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.