Merging of Two Arrays in C

C Program for Merge Sort.Learn to merge two sorted arrays into a single array so that the resulting merged array is also in sorted form.

			
					Array1 = 1 , 3 , 5
Array2 = 2 , 4 , 7 , 9
CombinedArray = 1 , 3 , 5 , 2 , 4 , 7 , 9

Let's assume there are two arrays, p and q, of a certain length. The length of the two arrays can differ.The merged array that will be created from the sorted elements of the preceding two arrays will be called array r.

The element at p[i] is compared with the element at q[j]. If p[i] is less than q[j], then p[i] is assigned to array r.Same for q[j] is with n p[i], then q[j] is assigned to array r.
If p[i] is equal to q[j], then both the elements are assigned to array r. p[i] is added to r[k].The values of the i and k indices are incremented. q[j] is also added to r[k], and the indices of the q and r arrays are incremented.

			
					#include <stdio.h>
#define max 100
void main()
{
    int p[max], q[max], r[max];
    int m, n;
    int i, j, k;
    printf("Enter length of first array:");
    scanf("%d", &m);
    printf("Enter %d elements of the first array in sorted order \n", m);
    for (i = 0; i < m; i++)
        scanf("%d", &p[i]);
    printf("\nEnter length of second array:");
    scanf("%d", &n);
    printf("Enter %d elements of the second array in sorted order\n", n);
    for (i = 0; i < n; i++)
        scanf("%d", &q[i]);
    i = j = k = 0;
    while ((i < m) && (j < n))
    {
        if (p[i] < q[j])
        {
            r[k] = p[i];
            i++;
            k++;
        }
        else
        {
            if (q[j] < p[i])
            {
                r[k] = q[j];
                k++;
                j++;
            }
            else
            {
                r[k] = p[i];
                k++;
                i++;
                r[k] = q[j];
                k++;
                j++;
            }
        }
    }

    while (i < m)
    {
        r[k] = p[i];
        k++;
        i++;
    }

    while (j < n)
    {
        r[k] = q[j];
        k++;
        j++;
    }

    printf("\nThe combined sorted array is:\n");
    for (i = 0; i < k; i++)
        printf("%d\n", r[i]);
}

			
					Enter length of first array:3
Enter 3 elements of the first array in sorted order 
1 2 4
Enter length of second array:4
Enter 4 elements of the second array in sorted order
5 6 7 8
The combined sorted array is:
1
2
4
5
6
7
8

Merging two sorted arrays into a single array in C

Merging of Two Arrays in C