Multidimensional array

Question

Consider the following code given below
 

int A[8][8], p, q;
for(p = 0; p < 8; ++p)
for(q = 0; q < 8; q++)
{
A[p][q] = A[q][p];
}

What will happen to matrix A ?

Comments

if 2d array is represented as matrix then transpose of matrix is the answer ...

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Thanks @ManojK, My bad,

 

lets take an example-

A=

   1  2  3

   4  5  6

   7  8  9

and after execution it has become -

 1  4  7

 4  5  6

 7  6  9

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.......

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A will become symmetric matrix.

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Now fine.

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(1)For transpose take a new array .Copy the element.

B[j][i]=a[i][j];

(2) If you want make change in same array.

Simply reverse the loop

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If it was a swap operation between A[p][q] and A[q][p], then we would have got the same A.

And if it was swap + 2nd for loop = for(q=p ; q< 8 ; q++) then it would have transpose of A.

@ManojK , now check..

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Not getting copy and edit the code here .

Answer 1

it convert A into  symmetric matrix

try on 3 x 3 matrix

Answer 2

symmetric matrix

p=0   for(q = 0; q < 8; q++) replace 1st row with 1st column

p=1   for(q = 0; q < 8; q++) replace 2nd row with 2nd column

and so on

try with 3*3 matrix