Need Help In Merge Short

merge_short.c

#include <cs50.h>
#include <stdio.h>

void merge_short(int arr[], int start, int end);
void merge(int arr[],int start1,int mid, int mid1, int end);

int temparr[6] = {0};

int main(void)
{
    int arr[] = {5,4,9,8,2,6};
    int size = 6;
    
    for(int i = 0; i < size; i++)
    {
        printf("%d\n",arr[i]);
    }
    
    printf("new array\n");
    
    merge_short(arr, 0, size - 1);
    
    for(int i = 0; i < size; i++)
    {
        printf("%d\n",temparr[i]);
    }
}

void merge_short(int arrp[], int start, int end)
{
    if(end > start)
    {
        int mid = (end + start) / 2;
        
        merge_short(arrp, start, mid);
        
        merge_short(arrp, mid+1, end);
        
        merge(arrp, start, mid,mid+1,end);
    }
}


void merge(int arrp[],int start1, int mid, int mid1, int end)
{
    int count = start1;
    int i = start1;
    int j = mid1;
	while(i <= mid && j <= end)
	{
        if(arrp[i] < arrp[j])
        {
            temparr[count] = arrp[i];
            i++;
        }
        else
        {
            temparr[count] = arrp[j];
            j++;
        }
        count++;
	}
	
	if(i > mid)
	{
	    for(int a = j; a < end; a++)
	    {
    	    temparr[count] = arrp[a];
    	    count++;
	    }
	}
	if(j > end)
	{
	    for(int a = i; a < mid+1; a++)
	    {
    	    temparr[count] = arrp[a];
    	    count++;
	    }
	}
}