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  1. #include <stdio.h>
  2. #include <assert.h>
  3.  
  4. int main()
  5. {
  6.     // These are their sizes here. So just to prove it.
  7.     assert(sizeof(char) == 1);
  8.     assert(sizeof(short) == 2);
  9.     assert(sizeof(float) == 4);
  10.  
  11.     // Little endian
  12.     union {
  13.         short s;
  14.         char c[2];
  15.     } endian;
  16.     endian.s = 0x00FF; // would be stored as FF 00 on little
  17.     assert((char)endian.c[0] == (char)0xFF);
  18.     assert((char)endian.c[1] == (char)0x00);
  19.  
  20.     union {
  21.         float f;
  22.         unsigned char c[4];
  23.     } var;
  24.     var.f = 0.0003401360590942204;
  25.     printf("%x %x %x %x\n", var.c[3], var.c[2], var.c[1], var.c[0]); // little endian
  26.     return 0;
  27. }
Success #stdin #stdout 0s 1788KB
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39 b2 54 4a
https://ideone.com/ienG2b
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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