fork download
copy 
  1. #include <stdio.h>
  2. #include <time.h>
  3. #include <algorithm>
  4. #include <random>
  5. #include <x86intrin.h>
  6.  
  7. #pragma pack(push, 1)
  8. struct test{
  9. 	union{
  10. 		struct{char data[8]; };
  11. 		struct{char a; float x; char b[3]; };
  12. 	};
  13. };
  14. #pragma pack(pop)
  15.  
  16. union soft{
  17. 	float x;
  18. 	char c[4];
  19. };
  20.  
  21. int main()
  22. {
  23. 	soft a;
  24. 	a.x=124.12414;
  25. 	test b;
  26. 	for (int i=0;i<4;i++){
  27. 		b.data[i+1]=a.c[i];
  28. 	}
  29. 	float* m=&b.x;
  30. 	printf("%.6f\n",a.x);
  31. 	printf("%.6f\n",*(float*)&b.x);
  32. 	printf("%.6f\n",*(float*)(&b.data[1]));
  33. 	printf("%.6f\n",*m);
  34.  
  35. }
  36.  
Success #stdin #stdout 0s 4504KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
124.124138
124.124138
124.124138
124.124138
https://ideone.com/ika5RK
language:
C++14 (clang 8.0)
created:
3 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!