Answer:
The program in Java is as follows:
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int x, y;
System.out.print("x and y: ");
x = input.nextInt(); y = input.nextInt();
int[][] twoD_arr = new int[x][y];
for(int i = 0;i<x;i++){
for(int j =0;j<y;j++){
twoD_arr[i][j] = (int)(Math.random() * 100); } }
System.out.print("Search: ");
int numSearch = input.nextInt();
int count = 0;
for(int i = 0;i<x;i++){
for(int j =0;j<y;j++){
if(twoD_arr[i][j] == numSearch){
count++;
System.out.println("Row "+(1+i)+" Column "+(j+1)); } } }
if(count == 0){ System.out.print("Key does not exist"); }
}
}
Explanation:
Declare x and y
int x, y;
Prompt user for x and y
System.out.print("x and y: ");
Get input for x and y
x = input.nextInt(); y = input.nextInt();
Declare the two dimensional array
int[][] twoD_arr = new int[x][y];
Iterate through the rows
for(int i = 0;i<x;i++){
Iterate through the columns
for(int j =0;j<y;j++){
Get input for each cell
twoD_arr[i][j] = (int)(Math.random() * 100); } }
Prompt the user for search key
System.out.print("Search: ");
Get input search key
int numSearch = input.nextInt();
Initialize count to 0
int count = 0;
Iterate through the rows
for(int i = 0;i<x;i++){
Iterate through the columns
for(int j =0;j<y;j++){
Check if current element and the search key are the same.
if(twoD_arr[i][j] == numSearch){
Increment count by 1, if they are the same
count++;
Print the position
System.out.println("Row "+(1+i)+" Column "+(j+1)); } } }
If count is 0, print key does not exist
if(count == 0){ System.out.print("Key does not exist"); }
