tim kiem Tuyen tinh, Nhi phan

#include<conio.h>
#include<stdio.h>
void nhap(int a[100],int n)
{
int i;

for(i=0;i<n;i++)
{
printf("a[%d]=",i);scanf("%d",&a[i]);
}
printf("\n");
}
void inra( int a[100],int n)
{
int i;
printf(" mang sau khi nhap");
for(i=0;i<n;i++)
printf("%3d",a[i]);
printf("\n");
}
int TimNP(int a[100],int n, int x)
{ int left, right, mid; left=0; right=n-1;

do
{
mid=(left+right)/2;
if(a[mid]==x) return 1;
else if (a[mid]<x) left=mid+1;
else right=mid-1;
}while(left<=right);
return 0;
}
void main()
{
int chon;
int a[100],n,i,x;
printf(" nhap n="); scanf("%d",&n);
nhap(a,n);

printf("\n Nhap phan tu x can tim : ");
scanf("%d" , &x);
int c=TimNP(a,n,x);
if (c==0)
printf("Ko tim thay phan tu %d", x);
else
printf("Tim duoc phan tu %d tai vi tri %d" , x , c);
getch();
}

Tên nghe wen quá,hình như là......,thôi dù sao cũng tk.^^!