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  1. #include <stdio.h>
  2. void printBits(size_t const size, void const * const ptr)
  3. {
  4.     unsigned char *b = (unsigned char*) ptr;
  5.     unsigned char byte;
  6.     int i, j;
  7.  
  8.     for (i=size-1;i>=0;i--)
  9.     {
  10.         for (j=7;j>=0;j--)
  11.         {
  12.             byte = b[i] & (1<<j);
  13.             byte >>= j;
  14.             printf("%u", byte);
  15.         }
  16.     }
  17.     puts("");
  18. }
  19.  
  20. int main(int argv, char* argc[])
  21. {
  22.         int i = 23;
  23.         unsigned int ui = 45;
  24.         float f = 23.45f;
  25.         printBits(sizeof(i), &i);
  26.         printBits(sizeof(ui), &ui);
  27.         printBits(sizeof(f), &f);
  28.         return 0;
  29. }
  30.  
Success #stdin #stdout 0s 9432KB
comments (?)
stdin
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Standard input is empty
stdout
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00000000000000000000000000010111
00000000000000000000000000101101
01000001101110111001100110011010
https://ideone.com/eAR3XS
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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