Nhờ sửa code mô phỏng thuật toán sắp xếp

mọi người giúp em sửa chữa code này với, nó sắp xếp không như mong muốn ạ

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<windows.h>
#include<conio.h>
#define size 100
#pragma warning (disable: 4996)

void gotoxy(int x, int y);
void sapxep(int a[], int n);
void taomang(int a[], int &n);
void xuatmang(int a[], int n);
void hoanvi(int &a, int &b, int c, int d);

int main()
{
    int n, m;
    int a[size];
    taomang(a,n);
    xuatmang(a,n); 
    gotoxy(0,8);
    xuatmang(a,n);
    sapxep(a,n);
    getch();
}

void taomang(int a[], int &n)
{
	scanf("%d", &n);
    for(int i = 0; i < n; i++)
        scanf("%d", &a[i]);
}

void xuatmang(int a[], int n)
{
    for(int i = 0 ; i < n ; i++)
        printf("%d ",a[i]);
}

void sapxep(int a[], int n)
{
    for (int i = 0; i < n-1; i++)
        for (int j = i+1; j < n; j++)
            if ( a[i] > a[j] )
                hoanvi(a[i],a[j],i,j);
    printf("

Done!!!");
}

void gotoxy(int x, int y)
{
    static HANDLE  h = NULL;
    if(!h)
        h = GetStdHandle(STD_OUTPUT_HANDLE);
    COORD c = {x,y};
    SetConsoleCursorPosition(h,c);
}

void hoanvi(int &a, int &b, int c, int d)
{
    int tmp,tmp1,tmp2,tmp3;
    for(int i = 7; i >= 4; i--)
    {
        Sleep(50);
        gotoxy(c,i+1);
            printf(" ");
        gotoxy(c,i);
            printf("%d",a);
        tmp = i;
    }
    for(int i = 1; i <= d-c; i++)
    {
        Sleep(50);
        gotoxy(c+i-1,tmp);
            printf(" ");
        gotoxy(c+i,tmp);
            printf("%d",a);
        tmp1 = c+i;
    }
    for(int i = 1; i <= 4; i++)
    {
        Sleep(50);
        gotoxy(tmp1,tmp+i-1);
            printf(" ");
        gotoxy(tmp1,tmp+i);
            printf("%d",a);
        gotoxy(d,8+i-1);
            printf(" ");
        gotoxy(d,8+i);
            printf("%d",b);    
        tmp2 = 8+i;    
    }    
    for(int i = 1; i <= d-c; i++)
    {
        Sleep(50);
        gotoxy(d-i+1,tmp2);
            printf(" ");
        gotoxy(d-i,tmp2);
            printf("%d",b);
        tmp3 = d-i;
    }
    for(int i = tmp2; i >= 8; i--)
    {
        Sleep(50);
        if(i != tmp2)
        {
            gotoxy(tmp3,i+1);
                printf(" ");
        }
        gotoxy(tmp3,i);
            printf("%d",b);
    }
    int temp = a;
    a = b;
    b = temp;
}