Question

In Java

Write a method named changeEvens which accepts a 4-digit positive integer and substitutes even digits with zero and returns a new integer. The new integer could have less digits. If the given integer is not a 4-digit integer or it is a negative integer the method returns zero.

• Examples:

changeEvens(1000)-> 1000

changeEvens(-1000)-> 0

changeEvens(8764)-> 700

changeEvens(5829)-> 5009

changeEvens(1012)-> 1010

Answer 1

input code:

output:

code:

public class Main
{
public static int changeEvens(int n)
{
/*declare the variables*/
int newnumber=0,m=0,multiply=10,i=0;
/*check number is less than zero or greter than 10000*/
if(n<0 || n<1000 || n>9999)
{
return 0;
}
else
{
/*take one array for store the digits*/
int array[]=new int[4];
/*store all the digits in the array*/
for(i=0;i<4;i++)
{
array[i]=n%10;
n=n/10;
}
/*make new number with zeros*/
for(i=3;i>=0;i--)
{
/*check first digit is even or not*/
if(i==3 && array[i]%2==0)
{
newnumber=newnumber*1;
}
/*check after first even or not*/
else if(array[i]%2==0)
{
array[i]=0;
newnumber=newnumber*multiply;
}
/*do this for odd digits*/
else
{
newnumber=newnumber*multiply+array[i];
}
}
return newnumber;/*return newnumber*/
}
}
   public static void main(String[] args)
   {
   /*call method*/
       System.out.println(changeEvens(1000));
       System.out.println(changeEvens(-1000));
       System.out.println(changeEvens(8764));
       System.out.println(changeEvens(5829));
       System.out.println(changeEvens(1012));
   }
}