While Loop wont calcuate my harmonic mean?
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I dont see any reason why my program wont calculate the harmonic mean of the inputed numbers. The formula for the harmonic mean is ((N)/((1/x1)+(1/x2)...+(1/xn)))
Here's what i got:
total=0;
cnt=0;
x=1;
while x~=0
x=input('Please input a positive number(0 to quit):');
if x<0
break;
end
if x==0
break;
end
cnt=cnt+1;
total=(1/total) + (1/x);
end
hmean=cnt/total;
if x<0
fprintf('Error - Negative Inputs Entered, Program Terminated')
else
fprintf('\nThe harmonic mean is %g',hmean)
end
采纳的回答
Matt Tearle
2011-3-10
total starts at 0, but then you have total=(1/total)+... That line should be total = total + (...) anyway.
BTW, I'm assuming you just can't use harmmean (from Statistics Toolbox)
As an aside, why not clean up the logic in the while loop by doing
if x>0
<calculate mean>
end
It will break out of the loop when x==0 anyway (so you don't really need the break).
3 个评论
Walter Roberson
2011-3-10
The while x=~0 is redundant and can be replaced with
while true
John
2011-3-10
Matt Tearle
2011-3-10
Just to clarify, Walter's suggestion works *if* you keep the "break"s you currently have. If you do what I said (get rid of the "break"s and use "if x>0..." instead, then don't change to "while true". That would be bad!
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