#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]);
	}
}

int timvitriamdau(float a[], int n)
{
	int vitri = -1;
	for(int i = 0; i < n; i++)
	{
		if(a[i] < 0)
		{
			vitri = i;
			break;
		}
	}
	return vitri;
}

float vitriamlonnhat(float  a[], int n, int vitriamdau)
{
	for (int i = vitriamdau + 1; i < n; i++)
	{
		if (a[i] < 0 && a[i] > a[vitriamdau])
		{
			vitriamdau = i;
		}
	}
	return vitriamdau;
}
int main()
{
	int n;
	float a[MAX];

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

	int vitriamdau = timvitriamdau(a, n);
	if(vitriamdau == -1)
	{
		printf("\nMang khong co so am");
	}
	else
	{
		int vitri = vitriamlonnhat(a, n, vitriamdau);
		printf("\nVi tri phan tu am lon nhat trong mang: %d",vitri);
	}

	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 'timvitriamdau':
Line 35: error: 'for' loop initial declaration used outside C99 mode
In function 'vitriamlonnhat':
Line 48: error: 'for' loop initial declaration used outside C99 mode