how to use sum in while loop
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I have another similar problem to the one i just asked. I still did not get the right answer. "Suppose you start adding the numbers 1 + 1/2 + 1/3 + 1/4 + 1/5+ ... together. Use a while loop to determine how many of these numbers you have to add in this way to get a sum that is greater than 4."
This is my code
a = 1;
c = 1;
t = a;
while t<4
c = c+1;
a = a+ 1/(a+1);
t = a+t;
end
回答（1 个）
Star Strider
2020-9-12
See if this does what you want:
c = 1;
t = 0;
while t<4
a = 1/c;
t = a+t;
c = c+1;
end
Check = find(cumsum(1./(1:50)) >= 4, 1, 'first');
The ‘Check’ test agrees.
2 个评论
Vy Do
2020-9-12
Star Strider
2020-9-12
The code is correct. The counting problem depends on how the incrementation is done.
This produces the ‘correct’ result, the only difference being the initial value of ‘c’, and the location of the ‘c’ increment calculation in the code:
c = 0;
t = 0;
while t<4
c = c+1;
a = 1/c;
t = a+t;
end
Check = find(cumsum(1./(1:50)) > 4, 1, 'first');
.
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2020-9-12
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