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  1. #include <stdio.h>
  2.  
  3. int weight(int a){
  4. 	int r = 0;
  5. 	while(a){
  6. 		a &= (a-1);
  7. 		++r;
  8. 	}
  9. 	return r;
  10. }
  11.  
  12. int LFSR(){
  13. 	static unsigned long ShiftRegister = 1;
  14.  
  15. 	ShiftRegister = (((((ShiftRegister >> 31)
  16. 					^(ShiftRegister >> 6)
  17. 					^(ShiftRegister >> 4)
  18. 					^(ShiftRegister >> 2)
  19. 					^(ShiftRegister >> 1)
  20. 					^ShiftRegister))
  21. 					& 0x00000001) << 31)
  22. 					| (ShiftRegister >> 1);
  23. 	return ShiftRegister & 0x00000001;
  24. }
  25.  
  26. void main(void){
  27. 	int a = 7;
  28. 	int c = weight(a);
  29. 	printf("%d\n", c);
  30.  
  31. 	int i;
  32. 	for(i = 0; i < 8; i++)
  33. 		printf("%d ", LFSR());
  34. 	scanf("%d", &a);
  35. }
Runtime error #stdin #stdout 0s 2012KB
comments (?)
stdin
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Standard input is empty
stdout
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3
0 0 0 0 0 0 0 0
https://ideone.com/oRvPco
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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