How do I complete this script for below question? I have partially created the script: see it below the question.

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NoDrivel
NoDrivel 2015-11-9
评论： Image Analyst 2015-11-9
Write a script that asks for a series of numbers and calculates the sum and the mean. When the user enters a value of 0, the script stops and performs the calculation. For example:
Enter a number (type 0 to end) : 5
Enter a number (type 0 to end) : 6
Enter a number (type 0 to end) : 7
Enter a number (type 0 to end) : 8
Enter a number (type 0 to end) : 0
4 numbers entered. Sum=26. Mean=6.5.
% initialisation
num==0;
while num==0
num=input('Enter a number (type 0 to end): ');
end %end while loop

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回答（1 个）

Image Analyst
Image Analyst 2015-11-9
Have an accumulator variable (not named sum, which is a built in function name):
% initialisation
num==0;
theSum = 0;
loopCounter = 0;
while num==0
num=input('Enter a number (type 0 to end): ');
if num == 0
break;
end
theSum = theSum + num;
loopCounter = loopCounter + 1;
end %end while loop
if loopCounter >= 1
fprintf('%d numbers entered. Sum=%f. Mean=%.1f\n',...
loopCounter, theSum, theSum/loopCounter);
else
fprintf('0 numbers entered.\n');
end
  2 个评论
Thorsten
Thorsten 2015-11-9
编辑：Thorsten 2015-11-9
First line should read
num = 1;
and while condition should read
while num ~= 0
And you could rewrite the code without a break, if you like, since the while loop breaks if its condition is false.
Image Analyst
Image Analyst 2015-11-9
Correct (I didn't notice the errors he had in his existing code).
Without the break line, you'd have to subtract 1 from the loop counter after the loop exits.

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