C Program on Recursive Binary Search

   #include<stdio.h>
   int main()
   {
     int a[10],i,n,m,c,l,u;
     printf("Enter the size of an array: ");
     scanf("%d",&n);
     printf("Enter the elements of the array: " );
     for(i=0;i<n;i++)
     {
       scanf("%d",&a[i]);
     }
     printf("Enter the number to be search: ");
     scanf("%d",&m);
     l=0,u=n-1;
     c=binary(a,n,m,l,u);
     if(c==0)
       printf("Number is not found.");
     else
       printf("Number is found.");
     return 0;
   }
   int binary(int a[],int n,int m,int l,int u)
   {
     int mid,c=0;
     if(l<=u)
     {
       mid=(l+u)/2;
       if(m==a[mid])
       {
         c=1;
       }
       else if(m<a[mid])
       {
         return binary(a,n,m,l,mid-1);
       }
       else
       return binary(a,n,m,mid+1,u);
     }
     else
       return c;
   }