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  1. #include <stddef.h>
  2. #include <stdint.h>
  3. #include <stdio.h>
  4. #include <limits.h>
  5.  
  6. static size_t itohexa_helper(char *dest, unsigned x) {
  7.   size_t ret =  x >= 16 ? itohexa_helper(dest, x / 16) : 0;
  8.   dest[ret] = "0123456789abcdef"[x & 15];
  9.   return ret + 1;
  10. }
  11.  
  12. size_t itohexa(char *dest, unsigned x) {
  13.   size_t ret = itohexa_helper(dest, x);
  14.   dest[ret] = '\0';
  15.   return ret;
  16. }
  17.  
  18. int main(void) {
  19.   char array[8];
  20.   uint16_t temperature = 0x1f11;
  21.   itohexa(array, temperature);
  22.   puts(array);
  23.   itohexa(array, 0);
  24.   puts(array);
  25.   itohexa(array, 0x1234567);
  26.   puts(array);
  27.   itohexa(array, UINT_MAX & 0xFFFFFFF);
  28.   puts(array);
  29. }
Success #stdin #stdout 0s 10320KB
comments (?)
stdin 
Standard input is empty
stdout 
1f11
0
1234567
fffffff
https://ideone.com/wcpl10
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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