C Exercises: Separate odd and even integers in separate arrays

Last update on December 20 2024 13:11:48 (UTC/GMT +8 hours)

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:

C Exercises: Separate odd and even integers in separate arrays

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:

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