Calculate address of an element in an array., Data Structure & Algorithms

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Q. Explain the technique to calculate the address of an element in an array. A 25 × 4 matrix array DATA is stored in memory in 'row-major order'. If base address is 200 and ω = 4 words per memory of the cell.  Calculate the DATA address [12, 3]                                                                                     

Ans:

In a row major representation, address of any element a[i][j] can be found using the formula written below: a[i][j]=base(a)+(i*m+j)*size where base(a) is base address, m is the number of columns and size represent size of word.

DATA[12,3]=200+(12*4+3)*4

=200+(48+3)*4

=200+51*4

=200+204

=404 

 

 

 

 


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