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  1. #include <stdio.h>
  2. #include <stdint.h>
  3.  
  4. uint8_t rotate_one_right(uint8_t value)
  5. {
  6.     unsigned saved_bit = value & 1;  // Save the LSB
  7.     value >>= 1;  // Shift right
  8.     value |= saved_bit << 3;  // Make the saved bit the nibble MSB
  9.     return value;
  10. }
  11.  
  12. int main(void)
  13. {
  14.     uint8_t value = 0x08;  // Set the high bit in the low nibble
  15.     printf("%02hhx\n", value);  // Will print 08
  16.     value = rotate_one_right(value);
  17.     printf("%02hhx\n", value);  // Will print 04
  18.     value = rotate_one_right(value);
  19.     printf("%02hhx\n", value);  // Will print 02
  20.     value = rotate_one_right(value);
  21.     printf("%02hhx\n", value);  // Will print 01
  22.     value = rotate_one_right(value);
  23.     printf("%02hhx\n", value);  // Will print 08 again
  24.  
  25.     return 0;
  26. }
  27.  
Success #stdin #stdout 0s 2168KB
comments (?)
stdin 
Standard input is empty
stdout 
08
04
02
01
08
https://ideone.com/rVW0Bq
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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