Problem 564. How to subtract?

Created by AMITAVA BISWAS

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± ± ± ± ± ± ± ± ± ± ±

Imagine you need to subtract one number from another using MATLAB.
You will not be using eval for this task.
Given two ASCII strings representing two integers X and Y.
Each of them has only 12 or less ASCII characters.
Each of them represents signed integers, such as '+2345'
Please output the result of (X-Y) in a similar style.

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7613 Solutions
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Last Solution submitted on Jul 08, 2020

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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 Siqueira Telles Vieira on 2 Jul 2020 at 6:48

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

Rafael Siqueira Telles Vieira on 2 Jul 2020 at 6:52

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.....

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Problem 564. How to subtract?

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Problem 564. How to subtract?

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