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  1. #include <stdio.h>
  2.  
  3. int main (int argc, char **argv)
  4.   {
  5.   union
  6.     {
  7.     int b4 ;                /* 4byte    */
  8.     unsigned short b2 [2] ; /* 2byte×2 */
  9.     unsigned char b1 [4] ;  /* 1byte×4 */
  10.     } bytes ;
  11.  
  12.   bytes.b4 = 0x12345678 ;
  13.   printf ("bytes.b4: %08X\n", bytes.b4) ;
  14.   printf ("bytes.b2: %04X, %04X\n", bytes.b2[0], bytes.b2[1]) ;
  15.   printf ("bytes.b1: %02X, %02X, %02X, %02X\n", bytes.b1[0], bytes.b1[1], bytes.b1[2], bytes.b1[3]) ;
  16.   return 0 ;
  17.   }
  18.  
Success #stdin #stdout 0s 2248KB
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stdin
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Standard input is empty
stdout
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bytes.b4: 12345678
bytes.b2: 5678, 1234
bytes.b1: 78, 56, 34, 12
https://ideone.com/fl4wHC
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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