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  1. #include <stdio.h>
  2.  
  3. int divBytesBy10(unsigned char* bytes, size_t count, unsigned char* remainder)
  4. {
  5.   unsigned carryOver = 0;
  6.   int nonZeroQuotient = 0;
  7.  
  8.   while (count--)
  9.   {
  10.     carryOver = carryOver * 256 + *bytes;
  11.     *bytes = carryOver / 10;
  12.     carryOver %= 10;
  13.  
  14.     nonZeroQuotient |= *bytes++;
  15.   }
  16.  
  17.   *remainder = '0' + carryOver; // convert to ASCII right here
  18.   return nonZeroQuotient;
  19. }
  20.  
  21. int main(void)
  22. {
  23.   unsigned char num[] = {0xFF, 0xFF, 0xFF, 0xFF}, rem, cnt = 0;
  24.   char str[11], *p = str + sizeof(str) - 1;
  25.   *p = '\0';
  26.   while (divBytesBy10(num, sizeof(num), --p)) {}
  27.   printf("%s\n", p);
  28.   return 0;
  29. }
  30.  
Success #stdin #stdout 0.01s 1720KB
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4294967295
https://ideone.com/GZu4Z
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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