Separate odd and even elements of array

Write a C Program to separate odd and even elements of array in two separate arrays. Here’s simple Program to separate odd and even elements of array in two separate arrays in C Programming Language.

What is an Array ?

Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Instead of declaring individual variables, such as number0, number1, …, and number99, you declare one array variable such as numbers and use numbers[0], numbers[1], and …, numbers[99] to represent individual variables. A specific element in an array is accessed by an index.

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element.

Here is source code of the C Program to separate odd and even elements of array in two separate arrays. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

SOURCE CODE : :

/* C Program to separate odd and even elements of array in two separate arrays */

#include <stdio.h>

#define MAX_SIZE 1000 //Maximum size of the array

void printArray(int arr[], int len);



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

    /*
     * Reads size and elements in the array
     */
    printf("Enter size of the array: ");
    scanf("%d", &n);
    printf("\nEnter elements in the array: \n");
    for(i=0; i<n; i++)
    {
        printf("\nEnter %d element in the array: ",i+1);
        scanf("%d", &arr[i]);
    }

    evenCount = oddCount = 0;
    for(i=0; i<n; 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;
}



/**
 * Prints 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");
}

OUTPUT : :

Enter size of the array: 6

Enter elements in the array:

Enter 1 element in the array: 1

Enter 2 element in the array: 2

Enter 3 element in the array: 3

Enter 4 element in the array: 4

Enter 5 element in the array: 5

Enter 6 element in the array: 6

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

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

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