binary search

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int low,high,mid,j,n,x;
    int a[10];
    printf("Enter how many numbers");
    scanf("%d",&n);
    for(j=0;j<n;j++)
    {
        scanf("%d",&a[j]);
    }
    printf("which number do you want");
    scanf("%d",&x);
    low=1;
    high=n;

    while(low<=high)
           {
            mid=(low+high/2);

         if(x<a[mid])
        {
            high=mid-1;
        }
        else if(x>a[mid])
        {
            low=mid+1;
        }
        else if(a[mid]==x)
        {
            printf("number found %d",mid);
 break;
        }


    }
    if(j==0)
    {
        printf("number not found");
    }
    return mid;
}