Merge two arrays

Posted on Apr 24, 2020

C program to merge two one dimensional arrays elements.

Program

#include<stdio.h>
#include<conio.h>
#define MAX 50

void read_array(int a[MAX], int n)
{
    int i;
    for(i=0;i<n;i++)
    {
        printf("Element %d\t:",i+1);
        scanf("%d",&a[i]);
    }
}

void print_array(int a[MAX], int n)
{
    int i;
    for(i=0;i<n;i++)
    {
        printf("Element %d\t:%d\n",i+1,a[i]);
    }
}

void merge(int a[MAX], int n1, int b[MAX], int n2, int c[MAX*2])
{
    int i, j;
    for(i=0;i<n1;i++)
    {
        c[i] = a[i];
    }
    for(j=0;j<n2;j++)
    {
        c[i] = b[j];
        i++;
    }
}

void main()
{
    int arr1[MAX], arr2[MAX], arr3[MAX*2];
    int n1, n2;

    printf("Enter the number of elements in first array\t:");
    scanf("%d",&n1);
    printf("Enter the elements of the array\n");
    read_array(arr1, n1);

    printf("Enter the number of elements in second array\t:");
    scanf("%d",&n2);
    printf("Enter the elements of the array\n");
    read_array(arr2, n2);

    merge(arr1, n1, arr2, n2, arr3);

    printf("\nMerged array\n");
    print_array(arr3, n1+n2);

    getch();
}

Output

Enter the number of elements in first array     :5
Enter the elements of the array
Element 1       :12
Element 2       :25
Element 3       :56
Element 4       :69
Element 5       :98
Enter the number of elements in second array    :4
Enter the elements of the array
Element 1       :85
Element 2       :54
Element 3       :41
Element 4       :15

Merged array
Element 1       :12
Element 2       :25
Element 3       :56
Element 4       :69
Element 5       :98
Element 6       :85
Element 7       :54
Element 8       :41
Element 9       :15