Question

Find the maximum value and minimum value in milesTracker. Assign the maximum value to maxMiles, and the minimum value to minMiles. Sample output for the given program:

Min miles: -10
Max miles: 40

import java.util.Scanner;

public class ArraysKeyValue {
public static void main (String [] args) {
Scanner scnr = new Scanner(System.in);
final int NUM_ROWS = 2;
final int NUM_COLS = 2;
int [][] milesTracker = new int[NUM_ROWS][NUM_COLS];
int i;
int j;
int maxMiles; // Assign with first element in milesTracker before loop
int minMiles; // Assign with first element in milesTracker before loop

for (i = 0; i < milesTracker.length; i++){
for (j = 0; j < milesTracker[i].length; j++){
milesTracker[i][j] = scnr.nextInt();
}
}

/* Your solution goes here */

System.out.println("Min miles: " + minMiles);
System.out.println("Max miles: " + maxMiles);
}
}

Answer 1

import java.util.Scanner;

public class ArraysKeyValue2 {
    public static void main (String [] args) {
        Scanner scnr = new Scanner(System.in);

        final int NUM_ROWS = 2;
        final int NUM_COLS = 2;
        int [][] milesTracker = new int[NUM_ROWS][NUM_COLS];
        int i;
        int j;
        int maxMiles; // Assign with first element in milesTracker before loop
        int minMiles; // Assign with first element in milesTracker before loop

        for (i = 0; i < milesTracker.length; i++){
          for (j = 0; j < milesTracker[i].length; j++){
            milesTracker[i][j] = scnr.nextInt();
          }
        }

        maxMiles = milesTracker[0][0];
        minMiles = milesTracker[0][0];

        for(i = 0;i<NUM_ROWS;i++){
            for(j = 0;j<NUM_COLS;j++){
                if(minMiles > milesTracker[i][j]){
                    minMiles = milesTracker[i][j];
                }
                if(maxMiles < milesTracker[i][j]){
                    maxMiles = milesTracker[i][j];
                }
            }
        }

        System.out.println("Min miles: " + minMiles);
        System.out.println("Max miles: " + maxMiles);
    }
}