arrays - wrong results from simple java method -


this question has answer here:

i'm trying write program asks size of array of integers, values of array, , finds average of positive integers , prints it. when run it, wrong results. haven't identified on wrong results depends example if enter following input: "array size: 4, array values: 1, 2, -5, 5" average of "2.0"

here's code:

import java.util.scanner; public class mitra {  private static scanner user_input;  double avg (int[] arr, int size) {     int sum = 0;     int numbers = 0;     (int i=0; i<size;i++)     {         if (arr[i]>0)         {             sum = sum+arr[i];             numbers++;         }         else{             continue;         }     }     double average = sum/numbers;     return average; }   public static void main(string[] args) {     user_input = new scanner (system.in);     system.out.println("enter array length");     int alength = user_input.nextint();     int[] array_1 = new int[alength];     (int i=0; i<alength;i++)     {         system.out.println("enter array value "+i);         array_1[i] = user_input.nextint();     }     mitra obj = new mitra();     double result = obj.avg(array_1, alength);     system.out.println("the average of positive numbers of array "+result); }  }

change

double average = sum/numbers;

to

double average = (double)sum/numbers;

to force floating point division.

otherwise, int division (which operation takes place when dividing 2 variables of int type) give 2 when dividing 8/3 (as in example).


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