Problem 564. How to subtract?

Created by AMITAVA BISWAS

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>&amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn &amp;plusmn</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"1\"/></w:numPr></w:pPr><w:r><w:t>Imagine you need to subtract one number from another using MATLAB.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"1\"/></w:numPr></w:pPr><w:r><w:t>You will not be using eval for this task.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"1\"/></w:numPr></w:pPr><w:r><w:t>Given two ASCII strings representing two integers X and Y.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"1\"/></w:numPr></w:pPr><w:r><w:t>Each of them has only 12 or less ASCII characters.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"1\"/></w:numPr></w:pPr><w:r><w:t>Each of them represents signed integers, such as '+2345'</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"1\"/></w:numPr></w:pPr><w:r><w:t>Please output the result of (X-Y) in a similar style.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

8065 Solutions
1457 Solvers

Last Solution submitted on Oct 21, 2021

Last 200 Solutions

Problem Comments

6 Comments

6 Comments

Show 3 older comments

Mohamed Atyya on 30 Oct 2017

good

nipun garg on 8 Jun 2018

function z = mysub(x,y)
z = num2str( str2num(x) - str2num(y) );
end

why this is not working for this code?

Matt Offredi on 8 Mar 2019

Nice

Mark Sanderson on 14 Mar 2019

Hi. My code only prints out '-' for a negative number but not '+' for a positive. Can anyone help? function Z = mysub(X,Y); W = (str2num(X))-(str2num(Y)); Z = num2str(W); end

Rafael S.T. Vieira on 2 Jul 2020

actually each of them has 14 characters or less...15 if we count the signs.

Rafael S.T. Vieira on 2 Jul 2020

Mark Sanderson, if W > 0 Z = ['+' ...]

Solution Comments

Solution 2178846

1 Comment

1 Comment

Maryam HCTRAK Yousef on 28 Mar 2020

piece of cake

Solution 1641172

1 Comment

1 Comment

wu on 10 Oct 2018

+-=

Solution 1596845

1 Comment

1 Comment

A C on 31 Jul 2018

string to double and sprintf

Solution 1355159

1 Comment

1 Comment

Giuseppe Ridinò on 23 Nov 2017

Need to calculate the difference ... not the sum! :)

Solution 1312264

1 Comment

1 Comment

Looky on 24 Oct 2017

Sorry for this...just had to try regexp. Somehow, the size of this is calculated completly wrong.....

Problem Recent Solvers1457

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 564. How to subtract?

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1457

Suggested Problems

More from this Author100

Problem Tags

Community Treasure Hunt

Problem 564. How to subtract?

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1457

Suggested Problems

More from this Author100

Problem Tags

Community Treasure Hunt

Players