For loop nested in while loop problem

2013 10 18
2 个回答
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更新时间：2013 10 18
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I have written a while loop that is supposed to determine the value of the parameter "n" for "a" to exceed the value 300. I know "n" should be 17, but I'm getting a value of 4 instead. Does anyone see the problem?
The code is as follows:
a = 10;
k = 0.5;
n = 2;
while a < 300
for m = 1:5
a = a + (a*k) + n;
end
n = n + 1;
end

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 采纳的回答

Terry
Terry 2013-10-18

0 个投票

I realized that I didn't reinitialize my "a" variable, thanks to Barmar's comment. Although the code might not look very efficient, this is what works for me:
a = 10;
k = 0.5;
n = 2;
while a < 300
a = 10;
for m = 1:5
a = a + (a*k) + n;
end
if a >= 300
break
end
n = n + 1;
end

更多回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-10-18
编辑：Azzi Abdelmalek 2013-10-18

0 个投票

Why are you using a for loop from 1 to 5? You are not supposed to increment n instead of m?

2 个评论
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Terry
Terry 2013-10-18
I want to increment both "n" and "m." The "m" is supposed to iterate "a" 5 times for every new "n" value until "a" exceeds 300.
Anthony
Anthony 2013-10-18
matlab is telling you the correct answer. iterating the following for 5 times will give a pretty large number.
a = a + (a*k) + n;

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