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is my solution wrong?

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Mohammad Adeeb
Mohammad Adeeb on 10 Mar 2018
Closed: MATLAB Answer Bot on 20 Aug 2021
close all;
clear all; %#ok<*CLSCR>
clc;
syms r z;
p1=input('specify the pol cofficent');
s=input('specify the operation','s');
p2=input('specify the second poly');
L_1=length(p1);
L_2=length(p2);
L=abs(L_1 - L_2);
if L_1>L_2
z=zeros(1,L_2);
A=[z p2];
end;
if L_1<L_2
z=zeros(1,L_1);
A=[z p1];
end;
hold on;
while s~='=';
if s=='+'
r= p1+p2;
elseif s=='-';
r= p1-p2;
elseif s=='*';
r= p1.*p2;
elseif s=='/';
r=p1./p2;
elseif s=='=';
print(r)
end;
ezplot(r,[-2,2]);
end;
hold off;
if s=='=';
r = pol_1;
end;
ezplot (r,[-2,2]);
  2 Comments
John D'Errico
John D'Errico on 10 Mar 2018
Surely you can test your solution. Code that is wrong produces errors. It produces strange, unexpected results. So what do you think? Is it right?
Will your code work on two polynomials of different order?
Why do you create the variable A if you do not use it?
Is it correct that the product of two polynomials is the product of their coefficients?
There are lots of problems that I see here. So, yes, your solution is wrong.

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