C Exercises: Separate odd and even integers in separate arrays

C Array: Exercise-10 with Solution

Write a program in C to separate odd and even integers into separate arrays.

The task requires writing a C program to separate odd and even integers from a given array into two separate arrays. The program will take a specified number of integer inputs, store them in an array, and then create and display two new arrays: one containing all even elements and the other containing all odd elements.

Visual Presentation:

Sample Solution:

C Code:

#include <stdio.h>

int main()
{
    int arr1[10], arr2[10], arr3[10];
    int i, j = 0, k = 0, n;

    // Prompt user for input
    printf("\n\nSeparate odd and even integers in separate arrays:\n");
    printf("------------------------------------------------------\n");
    printf("Input the number of elements to be stored in the array :");
    scanf("%d", &n);

    // Input elements for the array
    printf("Input %d elements in the array :\n", n);
    for (i = 0; i < n; i++)
    {
        printf("element - %d : ", i);
        scanf("%d", &arr1[i]);
    }

    // Separate odd and even integers into separate arrays
    for (i = 0; i < n; i++)
    {
        if (arr1[i] % 2 == 0)
        {
            arr2[j] = arr1[i];
            j++;
        }
        else
        {
            arr3[k] = arr1[i];
            k++;
        }
    }

    // Print the Even elements
    printf("\nThe Even elements are : \n");
    for (i = 0; i < j; i++)
    {
        printf("%d ", arr2[i]);
    }

    // Print the Odd elements
    printf("\nThe Odd elements are :\n");
    for (i = 0; i < k; i++)
    {
        printf("%d ", arr3[i]);
    }
    printf("\n\n");
	return 0;
}

Sample Output:

Separate odd and even integers in separate arrays:                                                            
------------------------------------------------------                                                        
Input the number of elements to be stored in the array :5                                                     
Input 5 elements in the array :                                                                               
element - 0 : 25                                                                                              
element - 1 : 47                                                                                              
element - 2 : 42                                                                                              
element - 3 : 56                                                                                              
element - 4 : 32                                                                                              
                                                                                                              
The Even elements are :                                                                                       
42 56 32                                                                                                      
The Odd elements are :                                                                                        
25 47

Explanation:

 printf("Input the number of elements to be stored in the array :");
       scanf("%d",&n);
   
       printf("Input %d elements in the array :\n",n);
       for(i=0;i<n;i++)
            {
	      printf("element - %d : ",i);
	      scanf("%d",&arr1[i]);
	    }

    for(i=0;i<n;i++)
    {
	if (arr1[i]%2 == 0)
	{
	   arr2[j] = arr1[i];
	   j++;
	}
	else
	{
	   arr3[k] = arr1[i];
	   k++;
	}
    }

    printf("\nThe Even elements are : \n");
    for(i=0;i<j;i++)
    {
	printf("%d ",arr2[i]);
    }

    printf("\nThe Odd elements are :\n");
    for(i=0;i<k;i++)
    {
	printf("%d ", arr3[i]);
    }

In the above code -

• The first printf statement prompts the user to input the number of elements they want to store in the array and stores it in the variable n using scanf.
• The second printf statement asks the user to input n number of elements into the array arr1 using a for loop, and stores each input in the corresponding index of the array arr1[i].
• The next for loop then iterates over each element in arr1, and separates the even and odd elements into two different arrays arr2 and arr3, respectively, using if-else statements. The variables j and k are used to keep track of the indices of the even and odd elements in the two arrays.
• Finally, the last two printf statements print out the even and odd elements found, respectively, using a for loop to iterate over each element in the two arrays.

Flowchart:

C Programming Code Editor:

Previous: Write a program in C to find the maximum and minimum element in an array.
Next: Write a program in C to sort elements of array in ascending order.