thuat toan timkien nhi phan c++

có ai giúp gấp cho em bài này được không, làm wài mà nó chẳng ra như ý cả. Chẳng là thuật toán tìm kiếm nhị phân đó mà. #include<graphics.h> #include<conio.h> #include<stdio.h> #include<math.h> #include<stdlib.h> #include<dos.h> #include<iostream.h> int array[100]; int mh=0,mode=0; //-------------------------------------// void Init_Graph(char*duongdan) { int gdriver = DETECT, gmode, errorcode; initgraph(&gdriver, &gmode,duongdan); errorcode = graphresult(); if (errorcode != grOk) { cout<<"Loi Khoi Tao Do Hoa: \n"<< grapherrormsg(errorcode); getch(); exit(1); } } //----------------------------------- void KhoiTao_Mang(int a[100],int n) { for(int i=0;i<n;i++) { a[i]=random(100); } } //----------------------------------- void In_Mang(int a[100],int n) { for(int i=0;i<n;i++) cout<<a[i]<<" "; } //---------------------------------- void SapXep(int a[100], int n) { for(int i=0;i<n-1;i++) for(int j=i+1;j<n;j++) { if (a[i]>=a[j]) { int tg=a[i]; a[i]=a[j]; a[j]=tg; } } } //--------------------------------------------- void Ve(int a[100],int n) { int Step; char st[10]; SapXep(a,n); Step=(getmaxx()-40)/n; outtextxy(Step-7,165,"LEFT"); outtextxy(n*Step+Step-30,165,"RIGHT"); for(int i=0;i<n;i++) { outtextxy(i*Step+Step,117,"|"); setfillstyle(9,random(15)); itoa(a[i],st,10); fillellipse(i*Step+Step+5,140,12,12); //circle(i*Step+Step+5,140,12); outtextxy(i*Step+Step,136,st); } int mid=(n)/2; setfillstyle(9,RED); itoa(a[mid],st,10); fillellipse(mid*Step+Step+5,140,12,12); outtextxy(mid*Step+Step,136,st); } //--------------------------------------------- int binarysearch(int a[100],int x,int n) { int left,right,mid; char*tg; left=0; right=n-1; int Step=(getmaxx()-40)/n; while(left<=right) { mid=(left+right)/2; if (a[mid]<x) { left=mid+1; tg="left"; } else { if (a[mid]>x) { right=mid-1; tg="right"; } else return mid; } char*strmid; while (!kbhit()) { //delay(100); gotoxy(5,7);cout<<" Vi tri:"<<mid; setcolor(random(15)); circle(mid*Step+Step+5,140,16); itoa(mid,strmid,10); outtextxy(mid*Step+Step+2,107,strmid); outtextxy(mid*Step+Step+2,165,tg); } getch(); } return -1; } void main() { clrscr(); Init_Graph("c:\\borlandc\\BGI"); //Paint(start,n); int n=15; setbkcolor(BLUE); setcolor(YELLOW); rectangle(2,2,getmaxx()-2,getmaxy()-2); rectangle(5,5,getmaxx()-5,getmaxy()-5); KhoiTao_Mang(array,n); gotoxy(17,2);cout<<"----- MO PHONG THUAT TOAN TIM KIEM NHI PHAN ----"; gotoxy(26,3);cout<<"Dinh Thu Hien - K8A - HVKTQS"; gotoxy(5,4);cout<<"* In Mang ban dau:\n"; gotoxy(5,5); In_Mang(array,n); setcolor(WHITE); gotoxy(5,6);cout<<"* Bieu dien tren truc so:"; line(30,120,getmaxx()-30,120); outtextxy(getmaxx()-30,117,">"); Ve(array,n); int Step=(getmaxx()-40)/n; int kq=binarysearch(array,44,n); char*st; if (kq!=-1) { while (!kbhit()) { // delay(100); gotoxy(5,7);cout<<" Vi tri tim thay:"<<kq; setfillstyle(9,random(15)); itoa(kq,st,10); setcolor(random(15)); circle(kq*Step+Step+5,140,16); outtextxy(kq*Step+Step+2,107,st); outtextxy(kq*Step+Step+2,200,"TIM THAY"); } } else outtextxy(kq*Step+Step+2,200,"KHONG TIM THAY"); getch(); closegraph(); } . KhoiTao_Mang(array,n); gotoxy(17,2);cout<<"----- MO PHONG THUAT TOAN TIM KIEM NHI PHAN ----"; gotoxy(26,3);cout<<"Dinh Thu Hien -