Thread: hex string to integer...

Hi,

Is there any library function available which will convert a passed hex string to its equivalent integer value???

Something like atoi() except that the input contains a hexadecimal string ("1A2" => 418).

TIA.

Originally posted by Salem
sscanf

I'm not sure how. Consider this code:

Code:

int main()                    
{                             
   char  str[50];             
   char  *hex_str   = "1A2";  
   int   int_output = 0;      
   
   /* how to get the hex value of hex_str in int_output such that
    * int_output has the integer value 
    *
    * using sscanf requires hex_str to be a hex integer pointer 
    * sscanf( str, "%x", hex_str ); 
    */
   
   /* should print "int_output is: 418" */
   printf( "int_output is: %d\n", int_output );
    
    
} /* end of main() */

sscanf( hex_str, "%x", & int_output);

Or you strtol() can be used, as:

Code:

l_ret = strtol(o_str, (char **)NULL, 16);
/*   Where, 16 tells the base of the number system (obviously 16 for HEX)   */