How can I stop my program and ask for the wish operation?

Question

Johan De Gracia 2020-11-29

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编辑： Setsuna Yuuki. 2020-12-2

Hello everyone, I have this program who ask for rows of matrix and columns. My problem is that once I have already asked for columns and rows of matrix A and B I need to ask what operation the person wants to do. For example. I need to ask "Selesct pointwise operation of matrices A and B: 1: Multiplication 2:Division 3:Exponential.

However my program realize the mutiplication and division by itself and I need to stop it and ask first.

disp(' ');

switch_1=1;

while switch_1==1

rows_matrix_A=input('Enter the rows of Matrix A => ');

columns_matrix_A=input('Enter the columns of Matrix A => ');

rows_matrix_B=input('Enter the rows of Matrix B => ');

columns_matrix_B=input('Enter the columns of Matrix B => ');

disp(' ')

if columns_matrix_A==rows_matrix_B

for i=1:rows_matrix_A

for j=1:columns_matrix_A

A(i,j)=input('Enter element of matrix A => ');

end

disp(' ')

for i=1:rows_matrix_B

for j=1:columns_matrix_B

B(i,j)=input('Enter element of matrix B => ');

end

disp(' ')

disp('Matrix A: ')

disp(A)

disp(' ')

disp('Matrix B: ')

disp(B)

C=A*B;

disp(' ')

disp('Matrix C: ')

disp(C)

D=A/B;

disp(' ')

disp('Matrix C: ')

disp(D)

else

disp('Error, Standard multiplication cannot be perfomed! ')

disp(' ')

end

switch_1=input('DO you want to run the program again? 1=YES 2=NO ');

disp(' ')

end

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Johan De Gracia 2020-12-2

???

Walter Roberson 2020-12-2

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Answer 1

Setsuna Yuuki. 2020-12-2

0
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https://ww2.mathworks.cn/matlabcentral/answers/668283-how-can-i-stop-my-program-and-ask-for-the-wish-operation#answer_563228

编辑：Setsuna Yuuki. 2020-12-2

在 MATLAB Online 中打开

You can use a if

umi = '1 = A*B   2 = A/B ';
    opc = input(umi); %input (multiply or divide?)
    
    disp('  ')
    disp('Matrix A:  ')
    disp(A)
    
    
    disp('  ')
    disp('Matrix B:  ')
    disp(B)
    
    if (opc == 1)
        C=A.*B;
        disp('  ')
        disp('Matrix C:  ')
        disp(C)
    elseif (opc == 2)
        D=A./B;
        disp('  ')
        disp('Matrix C:  ')
        disp(D)
    end