#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 KiemTraChan(int n)
//{
//	for(int i = 0; i < n; i++)
//	{
//		if(n % 2 != 0)
//		{
//			return 0;
//		}
//	}
//	return 1;
//}
int TimChanDau(int a[], int n)
{
	for(int i = 0; i < n; i++)
	{
		if(a[i] % 2 == 0)
		{
			return a[i];
		}
	}
	return -1;
}

int TimChanLonNhat(int a[], int n)
{
	int ChanMax = a[0];
	for(int i = 1; i < n; i++)
	{
		if(a[i] % 2 == 0 && a[i] > ChanMax)
		{
			 ChanMax = a[i];
		}
	}
	return ChanMax;
}

void LietKeViTriChanLonNhat(int a[], int n)
{
	int ChanMax = TimChanLonNhat(a, n);
	for(int i = 0; i < n; i++)
	{
		if(a[i] == ChanMax)
		{
			printf("%4d", i);
		}
	}
}
int main()
{
	int n;
	int a[MAX];

	nhap(a, n);
	xuat(a, n);

	int ViTriChanDau = TimChanDau(a, n);

	if(ViTriChanDau == -1)
	{
		printf("\nMang khong co so chan");
	}
	else
	{
		printf("\nCac vi tri co gia tri bang gia tri chan lon nhat la");
		LietKeViTriChanLonNhat(a, n);
	}

	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 'TimChanDau':
Line 45: error: 'for' loop initial declaration used outside C99 mode
In function 'TimChanLonNhat':
Line 58: error: 'for' loop initial declaration used outside C99 mode
In function 'LietKeViTriChanLonNhat':
Line 71: error: 'for' loop initial declaration used outside C99 mode