#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]);
	}
}

void TimMinMax(int a[], int n, int &max, int &min)
{
	max = a[0];
	min = a[0];
	for(int i = 1; i < n; i++)
	{
		max = (a[i] > max) ? a[i] : max;
		min = (a[i] < min) ? a[i] : min;
	}
}

void DoiMaxBangMinVaNguocLai(int a[], int n, int max, int min)
{
	for(int i = 0; i < n; i++)
	{
		if(a[i] == max)
		{
			a[i] = min;
		}
		else if(a[i] == min)
		{
			a[i] = max;
		}
	}
}
int main()
{
	int n, min, max;
	int a[MAX];

	nhap(a, n);
	xuat(a, n);
	TimMinMax(a, n, max, min);
	printf("\nDao nguoc min bang max va nguoc lai: ");
	DoiMaxBangMinVaNguocLai(a, n, max, min);
	xuat(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
t.c: At top level:
Line 32: error: expected ';', ',' or ')' before '&' token
In function 'DoiMaxBangMinVaNguocLai':
Line 45: error: 'for' loop initial declaration used outside C99 mode