#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAX 100

void nhap (int a[], int &n)
{
	do
	{
		printf("\nNhap so phan tu: ");
		scanf("%d", &n);
		if(n <= 0 || n > MAX)
		{
			printf("\nSo phan tu khong hop le. Xin kiem tra lai !");
		}
	}while(n <= 0 || n > MAX);
	for(int i = 0; i < n; i++)
	{
		printf("\nNhap a[%d]: ", i);
		scanf("%d", &a[i]);
	}
}

void xuat(int a[], int n)
{
	for(int i = 0; i < n; i++)
	{
		printf("%4d", a[i]);
	}
}

int KiemTraMangANamTrongMangB(int a[], int b[], int n, int m)
{
	int flag = 0;
	int dem = 0;
	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < m; j++)
		{
			if(a[i] == b[j])
			{
				dem++;
			}
		}
	}
	if(dem == n)
	{
		flag = 1;	
	}
	return flag;
}
int main()
{
	int n, m;
	int a[MAX];
	nhap(a, n);
	xuat(a, n);

	int b[MAX];
	nhap(b, m);
	xuat(b, m);

	int flag = KiemTraMangANamTrongMangB(a, b, n, m);
	if(flag == 1)
	{
		printf("\nTat ca cac phan tu trong mang A deu nam trong mang B");
	}
	else
	{
	printf("\nKhong thoa DK");
	}
	
	

	getch();
	return 0;
}

Line 17: error: conio.h: No such file or directory
Line 6: error: expected ';', ',' or ')' before '&' token
In function 'xuat':
Line 26: error: 'for' loop initial declaration used outside C99 mode
In function 'KiemTraMangANamTrongMangB':
Line 36: error: 'for' loop initial declaration used outside C99 mode
Line 38: error: 'for' loop initial declaration used outside C99 mode