C Program To Merge Two Sorted Arrays Element

#include<stdio.h>
int main()
{
    int sort_a[100],a1[50],b1[50],i,j,k,n,m;
    printf("enter size of first array:");
    scanf("%d",&n);
    printf("enter element in first array a1 in sorted order:");
    for(i=0;i<n;i++)
    {
        scanf("%d",&a1[i]);
    }
    printf("enter size of second array:");
    scanf("%d",&m);
    printf("enter element in second array b1 in a sorted order:");
    for(i=0;i<m;i++)
    {
        scanf("%d",&b1[i]);
    }
    i=j=k=0;
    while(i<(m+n))
    {
        if(j<=m && k<=n)
        { 
             /*check if curent element of array a1 is less
            than current element of array b1 if true 
            store current element of array a1 and increment
             array a1 index. otherwise do same with array b1 */
            if(a1[j]<b1[k])
            {
                sort_a[i]=a1[j];
                i++;
                j++;
            }
            else
            {
               sort_a[i]=b1[k];
               i++;
               k++;  
            }    
        }
        /* store remaining element of second array b1 */
        else if(j==m)
        {
            sort_a[i]=b1[k];
            k++;
            i++;
        }
        /* store remaining element of first array a1 */
        else
        {
            sort_a[i]=a1[j];
            j++;
            i++;
        }
    }
    printf("merge array:");
    for(i=0;i<(m+n);i++)
    {
       printf("%d\t",sort_a[i]); 
    }
    return 0;
}