Question

3. Suppose that an array of size 5 is declared, of type integer (4 bytes).

int theArray[5];

Also, suppose that the computer assigns the memory address 3152 to the variable at index 0.

Explain how the computer would access theArray[2], and what the memory address would be. Draw diagrams as necessary.

Following are example question and answer:

Suppose that an array of size 5 is declared, of type double (8 bytes). double theArray[5]; Also, suppose that the computer assigns the memory address 2100 to the variable at index 0. Explain how the computer would access theArray[3], and what the memory address would be. Draw diagrams as necessary.

Answer 1

Size of Given, integer zu bytes int the Assay [s]; We know that, Address of the Amay [i] = Base Addres +4²i [! Here base address given is "3152 To find : The address of the address he Away [a]. the Array [2] = 3152 of 3152 tuta L! =3160 = 3152 +8 Diagram 4 3 tinden 1 2 < the Array - Addresses 3152 3156 3160 3164 3168

Here the computer calculates the address of the accessing element using the formula.
The base address of the array + datatype size * (index of the element).
Here datatype size is 4 bytes and base address is 3152.
So the needed address of theArray[2] = 3152 + 4*2 = 3160.

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