Allocate storage to store a 3 row by 3 column two dimensional array of integers.

Question

Allocate storage to store a 3 row by 3 column

two dimensional

array of integers. Call the array A.

Initial

ize the array with each element’s

value as follows:

A[0][0] = 1

A[0][1] = 2

A[0][2] = 3

A[1][0] = 4

A[1][1] = 5

A[1][2] = 6

A[2][0] = 7

A[2][1] = 8

A[2][2] = 9

Then, have the program use a loop to continually ask the user to

input

a

pair of integers. The first

integer is the row number

(row)

and the second integer is the column number

(column)

of an

element in the array A.

One of these three action

s will be performed depending on the value of

the row number and column number inputted:

1.

If the row number is

-

1 and

the

column number is

-

1 then terminate the loop and the

program.

2.

Or, c

heck to

m

ake sure the row number and column number are valid

indices

for the array

A

. A valid index for array A is

0

, 1 or

2

. If either

the

row

number

or

the

column

number

(

or both) are invalid then

do nothing and return to the beginning of the loop to

ask for a

new pair of numbers.

3.

If

the row number and the column number

are valid

indices

then load the value of element

A[row][column] from memory and print out the value.

Then, return to the beginning of

the loop to

ask for a new pair of numbers.

Explanation / Answer

#include <iostream>
using namespace std;

int main()
{
int A[3][3] = {1,2,3,4,5,6,7,8,9};
int row,col;
  
do
{
cout<<" Enter row number and column number :";
cin>>row>>col;
  
if(row >=0 && row <3 && col >=0 && col <3)//validate row and column
cout<<" A["<<row<<"]["<<col<<"] = "<<A[row][col];//display A if valid row and column
}
while(row != -1 && col != -1);
  
   return 0;
}

Output:

Enter row number and column number :2 0
A[2][0] = 7
Enter row number and column number : 3 6
Enter row number and column number : 1 1
A[1][1] = 5
Enter row number and column number : 4 5
Enter row number and column number : 2 2
A[2][2] = 9
Enter row number and column number :-1 -1

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