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Sep 23rd, 2014
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  1. #include <stdio.h>
  2.  
  3. unsigned invert( unsigned x, int p , int n);
  4.  
  5. int main(void)
  6. {
  7.  
  8. printf("%d", invert(144,4,3));
  9.  
  10.  
  11.  
  12. return 0;
  13. }
  14.  
  15. unsigned invert( unsigned x , int p , int n)
  16. {
  17. unsigned msk = ~0;
  18. msk <<= n;
  19. msk = ~msk;
  20. msk <<= n-1;
  21.  
  22. // 144 WILL BE ---- 1001 0100
  23. // MSK WILL BE ---- 0001 1100
  24. // I ^ THAT
  25. // NEED RESULT ---- 1000 1000
  26.  
  27. x = msk ^ x;
  28. return x;
  29. // Im waiting on result of 1000 1000 but it return 140;;;
  30. }
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