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  1. #include <stdio.h>
  2.  
  3. typedef 	union
  4. 	{
  5. 		unsigned char uc[sizeof(double)];
  6. 		float f;
  7. 		double d;
  8. 	}u_t;
  9.  
  10. void print(u_t u, size_t size, int endianess)
  11. {
  12. 	size_t start = 0;
  13. 	int increment = 1;
  14.  
  15. 	if(endianess)
  16. 	{
  17. 		start = size - 1;
  18. 		increment = -1;
  19. 	}
  20.  
  21. 	for(size_t index = 0; index < size; index++)
  22. 	{
  23. 		printf("%hhx ", u.uc[start]);
  24. 		start += increment;
  25. 	}
  26. 	printf("\n");
  27. }
  28.  
  29.  
  30. int main(void) 
  31. {
  32. 	u_t u;	
  33. 	u.f = 3.15f;
  34.  
  35. 	print(u, sizeof(float),0);
  36. 	print(u, sizeof(float),1);
  37.  
  38. 	u.d = 3.15;
  39. 	print(u, sizeof(double),0);
  40. 	print(u, sizeof(double),1);
  41. 	return 0;
  42. }
  43.  
Success #stdin #stdout 0s 4496KB
comments (?)
stdin 
Standard input is empty
stdout 
9a 99 49 40 
40 49 99 9a 
33 33 33 33 33 33 9 40 
40 9 33 33 33 33 33 33
https://ideone.com/7ABZaj
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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