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missingInteger.java
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missingInteger.java
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/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package zerakiassessment;
//import java.lang.reflect.Array;
import java.sql.Array;
import java.util.Scanner;
/**
*
* @author Eclectics
*/
public class missingInteger {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
int array_sum = 0;
Scanner myObj = new Scanner(System.in);
System.out.println("Input number of elements in array:");
int n = myObj.nextInt();
int[] k = new int[n] ;
System.out.println("Input array elements:");
for(int i = 0; i < n; i++)
{
k[i] = myObj.nextInt();
array_sum = array_sum + k[i];
}
// System.out.println("Sum of array:"+array_sum);
// String input
int result;
result = missingInteger(array_sum, n);
System.out.println(result);
}
private static int missingInteger(int sum, int n){
int result = 0;
int sum_array = 0;
//get sum of array with all expected elements
for(int i = 1; i <= n+1; i++)
{
// System.out.println(i);
sum_array += i;
}
// System.out.println("real sum of array:"+sum_array);
result = sum_array - sum;
return result;
}
}