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1. 

   leaflabsandy
   Member

   itoa <standard C lib. stdlib.h> What Maple library is this function itoa in?

   Posted 5 years ago #
2. 

   snigelen
   Member

   Hi,

   It's a common function (some say, I've only seen it in avr-libc), but not standard. See for example Wikipedia for a base 10 implementation, or you could use sprintf() (or not, it will eat a lot of flash space :-().

   Posted 5 years ago #
3. 

   leaflabsandy
   Member

   Thanks ... for those who would also need this function itoa "integer to ASCII"
   to eaisly write to a LCD here it is...

   /* Ansi C "itoa" based on Kernighan & Ritchie's "Ansi C":
   */
   void strreverse(char* begin, char* end) {
   char aux;
   while(end>begin)
   aux=*end, *end--=*begin, *begin++=aux;
   }
   void itoa(int value, char* str, int base) {
   static char num[] = "0123456789abcdefghijklmnopqrstuvwxyz";
   char* wstr=str;
   int sign;

   // Validate base
   if (base<2 || base>35){ *wstr=''; return; }

   // Take care of sign
   if ((sign=value) < 0) value = -value;

   // Conversion. Number is reversed.
   do *wstr++ = num[value%base]; while(value/=base);
   if(sign<0) *wstr++='-';
   *wstr='';

   // Reverse string
   strreverse(str,wstr-1);
   }

   Posted 5 years ago #
4. 

   gbulmer
   Moderator

   Maybe the formatting of the post formatter, eat some characters, '' is not a valid character.
   I assume it should have been, '\', that is the four characters ', \\ , 0 and '

   LeafLabs: I tried to get this right, using backquotes, and I couldn't.

   Posted 5 years ago #
5. 

   leaflabsandy
   Member

   Hope this will fix it - for some reason my cut and paste did not work?
   It did it again ... it is THIS website that is messing up my paste?????
   It does not like the "aspos fwd slash zero aspos and semicolon" after the two *wastr=

   /* Ansi C "itoa" based on Kernighan & Ritchie's "Ansi C": */

   void strreverse(char* begin, char* end) {
   char aux;
   while(end>begin)
   aux=*end, *end--=*begin, *begin++=aux;
   }
   void itoa(int value, char* str, int base) {
   static char num[] = "0123456789abcdefghijklmnopqrstuvwxyz";
   char* wstr=str;
   int sign;

   // Validate base
   if (base<2 || base>35)
   { *wstr='''; //<----------------<<<<<<<<<<<<
   return; }

   // Take care of sign
   if ((sign=value) < 0) value = -value;

   // Conversion. Number is reversed.
   do *wstr++ = num[value%base]; while(value/=base);
   if(sign<0) *wstr++='-';
   *wstr=''; //<--------------------------<<<<<<<<<<<<<<<<<

   // Reverse string
   strreverse(str,wstr-1);
   }

   void setup() {

   }

   void loop() {

   }

   Posted 5 years ago #
6. 

   leaflabsandy
   Member

   They need to go to a more professional board/forum like the Arduino.

   Posted 5 years ago #
7. 

   CarlO
   Member

   Try putting your code between back-tick (`) characters. It will preserve formatting etc.

   Posted 5 years ago #
8. 

   gbulmer
   Moderator

   I did put the characters between back-ticks. It still removed formatting.
   Even more frustrating is the the backslash characters are consumed, so if you edit a piece of text, backslashes disappear :-(

   Posted 5 years ago #

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