C program to put even and odd elements of array in two separate array

Write a C program to input elements in array and put even and odd elements in separate array. How to separate even and odd array elements in two separate array containing only even or odd elements using C programming.

Input size of the array: 10
Input elements in array: 0 1 2 3 4 5 6 7 8 9

Output even elements in array: 0 2 4 6 8
Output odd elements in array: 1 3 5 7 9

Required knowledge

Basic Input Output, If else, For loop, Functions, Array

Program to separate even and odd array elements

/**
 * C program to separate even and odd array elements in two separate array
 */

#include <stdio.h>

#define MAX_SIZE 1000  // Maximum size of the array

/* Function to print array */
void printArray(int arr[], int len);



int main()
{
    int arr[MAX_SIZE];
    int even[MAX_SIZE], odd[MAX_SIZE];
    
    int evenCount, oddCount;
    int i, size;

    /* Input size of the array */
    printf("Enter size of the array: ");
    scanf("%d", &size);

    /* Input elements in array */
    printf("Enter elements in the array: ");
    for(i=0; i<size; i++)
    {
        scanf("%d", &arr[i]);
    }

    evenCount = 0;
    oddCount = 0;

    for(i=0; i<size; i++)
    {
        // If arr[i] is odd
        if(arr[i] & 1)
        {
            odd[oddCount] = arr[i];
            oddCount++;
        }
        else
        {
            even[evenCount] = arr[i];
            evenCount++;
        }
    }

    printf("\nElements of even array: \n");
    printArray(even, evenCount);

    printf("\nElements of odd array: \n");
    printArray(odd, oddCount);

    return 0;
}



/**
 * Print the entire integer array
 * @arr Integer array to be displayed or printed on screen
 * @len Length of the array
 */
void printArray(int arr[], int len)
{
    int i;
    printf("Elements in the array: ");
    for(i=0; i<len; i++)
    {
        printf("%d ", arr[i]);
    }
    printf("\n");
}

Learn more – program to sort even and odd elements separately.

Enter size of the array: 10
Enter elements in the array: 0 1 2 3 4 5 6 7 8 9

Elements of even array:
Elements in the array: 0 2 4 6 8

Elements of odd array:
Elements in the array: 1 3 5 7 9

Happy coding 😉