Sorting an array with if, for and while loop only.

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Rishabh Chaudhary 2021-8-13

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评论： Jan 2021-9-7

I have an array A and I want array B as result using only if, for and while loops (no in-built function).

A = [0 1 2 3 4 5 0 6 7 8 0 9 10 11 0 12 13 ]

B= [ 0 1 2 3 4 5 0 -6 -7 -8 0 9 10 11 0 -12 -13]

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Rishabh Chaudhary 2021-8-13

Sure and thank you for your valuable words.

Jan 2021-9-7

The vector B is not sorted, especially not a sorted version of vector A.

Maybe B is a copy of A where the sign in changed whenever a 0 occurs. Before you can implement this in code, you have to define exactly, what you want to achieve.

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Sreedhar Arumugam 2021-9-7

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There are many sorting algorithms that can be used to answer your question.

As a starter, I would recommend learning Bubble Sort which works by repeatedly swapping adjacent elements if they are in the wrong order. You can read up on Bubble Sort and look at some sample cases here -

https://www.geeksforgeeks.org/bubble-sort/

Once you understand the algorithm, the next step is implementing it in MATLAB.

arr = [5 4 3 2 1];
arr_size = length(arr);
for j = 0 : arr_size-1
    for i = 1: arr_size-j-1
        if arr(i)>arr(i+1)
            temp = arr(i);
            arr(i) = arr(i+1);
            arr(i+1) = temp;
        end
    end
end