WHY THIS CODE IS SHOWING ERROR ?

Question

SUDHANSHU SHARMA 2015-2-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/179381-why-this-code-is-showing-error

评论： Shrirang 2015-2-20

fprintf('\nAddition of two matrix');
n=input('\nEnter the value of n in n*n matrix= ');
for i=1:n
    for j=1:n
    a(i,j)=input('\nEnter value of a(%d,%d)= ',i-1,j-1);
    end
end
for i=1:n
    for j=1:n
        b(i,j)=input('\nEnter value of a(%d,%d)= ',i-1,j-1);
    end
end
for i=1:n
for j=1:n
fprintf('\t%f',a(i,j)+b(i,j));
end
end

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Answer 1

Roger Stafford 2015-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/179381-why-this-code-is-showing-error#answer_168662

在 MATLAB Online 中打开

The usage of 'input' is invalid. It cannot accept more than two inputs. Moreover it is unable to print out the values of i-1 and j-1 in the spaces indicated by %d, as would be true for 'fprintf'. See the documentation at:

http://www.mathworks.com/help/matlab/ref/input.html

For example you would need to write:

a(i,j)=input(['Enter value of a(',num2str(i-1),',',num2str(j-1),')= ']);

rather than

a(i,j)=input('\nEnter value of a(%d,%d)= ',i-1,j-1);

Note: I don't understand why you have offset the index values by 1 here!

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Answer 2

Shrirang 2015-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/179381-why-this-code-is-showing-error#answer_168663

Hi just replace your input statement "input('\nEnter value of a(%d,%d)= ',i-1,j-1)" at line 5and 10 by following statement input(['\nEnter value of a(' num2Str(i-1) ' ' num2str(j-1) ')']) and your code will work.

fprintf('\nAddition of two matrix'); n=input('\nEnter the value of n in n*n matrix= '); for i=1:n for j=1:n a(i,j)=input(['\nEnter value of a(' num2Str(i-1) ' ' num2str(j-1) ')']); end end for i=1:n for j=1:n b(i,j)=input(['\nEnter value of a(' num2Str(i-1) ' ' num2str(j-1) ')']); end end for i=1:n for j=1:n fprintf('\t%f',a(i,j)+b(i,j)); end end

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Shrirang 2015-2-20

Sorry, Your main question was why this code is not working : It is because input function has one argument and it is just a string. You probably trying to apply syntax from "c" in m script.In m script syntax for displaying string on command window is slightly different as shown in above code. Hope this works for you .

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