问题具体如下所述，麻烦大佬们帮忙看看怎么解决？

Question

This program will multiply 2 m x m matrices and print the results to a file called ‘matrix.txt’
EXACTLY as shown in the example output at the bottom of this page (including the horizontal and vertical
lines). The user should enter a value for m and then input each of the matrix elements as shown in the example
output. Each matrix must be stored as a multidimensional (multiple-scripted) array. Each element in the output
should be printed to 1 decimal place. Assume all the matrix elements entered by the user are small enough that
each of the elements in the output matrix is less than 100.
Note that MatLab can perform matrix multiplication for you, i.e. if you have 2 m x m matrices named A and B,
typing A*B will multiply the 2 matrices and output the result. For this assignment, YOU CANNOT LET
MATLAB MULTIPLY THE MATRICES FOR YOU! You must write the algorithm which calculates each of
the matrix elements.

Example output #1 for Part B:
>> matrix
This program multiplies two m x m matrices A and B.
Enter a value for m: 4
Enter row 1 of A as an array: [ 1.3 2.1 2.5 5.1 ]
Enter row 2 of A as an array: [ 2.4 3.2 4.1 0.8 ]
Enter row 3 of A as an array: [ 2.3 1.2 1.4 1.5 ]
Enter row 4 of A as an array: [ 3.3 0.7 0.6 1.3 ]
Enter row 1 of B as an array: [ 1.2 1.3 1.4 1.5 ]
Enter row 2 of B as an array: [ 2.8 2.3 2.2 1.5 ]
Enter row 3 of B as an array: [ 1.5 0.5 1.1 2.2 ]
Enter row 4 of B as an array: [ 1.8 1.4 0.9 0.5 ]

The file matrix.txt will look like:
A x B =
_ _
| 20.4 14.9 13.8 13.2 |
| 19.4 13.7 15.6 17.8 |
| 10.9 8.6 8.8 9.1 |
|_ 9.2 8.0 8.0 8.0 _ |

Answer 1

将下列语句保存在一个文件名为matrix.m的Matlab脚本文件里：clc;clear;disp('This program multiplies two m x m matrices A and B.');m=input('Enter a value for m: ');A=zeros(m,m);B=A;C=A;for i=1:mstr=sprintf('Enter row %d of A as an array: ',i);A(i,:)=input(str);endfor i=1:mstr=sprintf('Enter row %d of B as an array: ',i);B(i,:)=input(str);endfor i=1:mfor j=1:mfor k=1:mC(i,j)=C(i,j)+A(i,k)*B(k,j);endendendstr='AxB=';dlmwrite('matrix.txt',str,'delimiter',' ','newline','pc','precision','%s');dlmwrite('matrix.txt',C,'-append','delimiter',' ','newline','pc','precision','%.1f','roffset',1);

Answer 2

Cij = sum(Aik*Bkj) (k=1:m)按上式写个嵌套循环就搞定了,复杂度是n^2