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  1. #include <stdio.h>
  2.  
  3. union{
  4. char arr[4];
  5. long data;
  6. } test;
  7.  
  8. int main() {
  9. char c = 'a';
  10.  
  11. /* Test platform Endianness */
  12. for(int x = 0; x < 4; x++)
  13. test.arr[x] = c++;
  14. if ( test.data == 0x61626364 )
  15. /* It’s big endian and you do your stuff */
  16. {
  17. printf("Big endian");
  18. } else {
  19. printf("Little endian");
  20. }
  21. }
  22.  
  23.  
  24.  
Success #stdin #stdout 0s 5276KB
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stdin
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123
stdout
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Little endian
https://ideone.com/CvlhTr
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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