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

void nhap (float 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("%f", &a[i]);
	}
}

void xuat(float a[], int n)
{
	for(int i = 0; i < n; i++)
	{
		printf("%8.3f", a[i]);
	}
}

void LietKe(float a[], int n)
{
	int i, j;
	printf("\nCac cap gia tri (a, b) thoa DK a <= b , khac nhau tung doi mot: ");
	for (i = 0; i < n; i++)
	{
		for (j = i + 1; j < n; j++)
		{
			if (a[i] < a[j] || a[i] == a[j])
			{
				printf("\nCap <%.3f, %.3f> vi tri <a[%d],a[%d]>", a[i], a[j], i, j);
			}
		}
	}    
}

int main()
{
	int n;
	float a[MAX];

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