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strtoul

Usage

   #include <stdlib.h>
   unsigned long int strtoul(const char *nptr, char **endptr,int
   base);

   ANSI

Description

   Converts the ASCII string pointed to by nptr to a unsigned long decimal.
   It will recognize white space then an optionally signed string of digits.
   It will stop reading the string at the first character that doesn t
   represent a part of the number. A pointer to that character will be
   stored in the object endptr if endptr is not NULL.

   If base is zero the first character after the optional sign will
   determine the base of the conversion. If the first character is 0 and the
   second character is not x or X, then the string is interpreted as octal.
   If the first character is 0 and the second character is x or X it will be
   interpreted as a hexadecimal integer.

   If the first character is 1 through 9 the string is interpreted as
   decimal integer. The upper or lower case letters A to Z are assigned the
   values 10 through 35. Only letters with values less than the base are
   permitted. If the base is not 0, the base must be between 2 and 36.

Return Value

   If correct values would cause overflow ULONG_MAX is returned according to
   the sign and errno is set to ERANGE. If an unrecognized character is
   encountered before a legal character, zero is returned.

Example 

   #include <stdio.h>
   #include <stdlib.h>

   char *string,*string2;

   int main()
   {
       unsigned long result;
       long result1;
       double result2;
       int base;

       string = "3.1415926Stop here";
       result2 = strtod(string,&string2);
       printf("String [%s] strtod = [%f]\n",
               string,result2);
       base = 8;
       string = "1011013";
       result1 = strtol(string,&string2,base);
       printf("String [%s] strtol [%ld] (base 8)\n",
               string,result1);
       base = 2;

       string = "1011013";
       result = strtoul(string,&string2,base);
   !!!!!!!!!!!!!! Corupted from here !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
       printf("String [%s] strtoul [%ld] (base 2)\n",
           string,result);
       return EXIT_SUCCESS;
   }

See Also

   atoi, atol, strtol, scanf