1st assignment

#include<stdio.h>

int function(int arr[],int key,int first,int last)
{
    int mid;
    mid=(first+last)/2;
    while(first<=last)
      {


        if(arr[mid]==key)
        {

            return 1;
        }
        else  if(key>arr[mid])
        {
            first=mid+1;
            return function(arr,key,first,last);
        }
        else if(key<arr[mid])
        {

            last=mid-1;
            return function(arr,key,first,last);
        }

}
    if(first>last)
    {

        return 0;
    }

}
int main()
{

    int array[11];
    int key,j,i;
    for(j=0;j<11;j++)
    {
        printf("enter a element : ");
        scanf("%d",&array[j]);
        key= array[j];
       i=j-1;
       while((i>=0)&&(key<array[i]))
       {
           array[i+1]=array[i];
           i--;
       }
       array[i+1]=key;


    }
    for(j=0;j<11;j++)
    {

        printf("number is : %d",array[j]);
    }
    int res;
    res=function(array,16,0,10);
    if(res==1)
    printf("found");
    else
        printf("not");
}