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a guest May 19th, 2019 78 Never
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  1. #input
  2.  
  3. x=cellfun("str2double",strsplit(input('' ,'s')));
  4. y=cellfun("str2double",strsplit(input('' ,'s')));
  5. z=cellfun("str2double",strsplit(input('' ,'s')));
  6.  
  7. #vec
  8. v1=y .- x;
  9. v2=z .- x;
  10. #print("%f %f",v1,v2);
  11. #a.b=|a|.|b|cos(temp)
  12. temp=abs(acos((dot(v1,v2)/(norm(v1)*norm(v2)))*180/pi)); #rad deg
  13. printf("%f\n",temp);
  14. temp2=cross(v1,v2); #cross
  15. temp3=0.5*norm(temp2);
  16. print("%f\n",temp3);
  17. temp2=temp2 ./ temp2(1);
  18. printf("%f %f %f",temp2(1),temp2(2),temp2(3));
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