tinh bieu thuc

//https://www.facebook.com/pages/C%C3%B9ng-h%E1%BB%8Dc-l%E1%BA%ADp-tr%C3%ACnh/632038696941833
#include <iostream>
using namespace std;
struct SoHang
{
	int HeSo, SoMu;
};
void main()
{
	int y = 0;
	int n, x;
	SoHang *SH;
	cout << "Nhap bac cua da thuc: ";
	cin >> n;
	n = n + 1;//bao gom so hang co so mu  = 0
	SH = new SoHang[n];
	for (int i = 0; i < n; i++)
	{
		cout << "Hang tu bac " << i << endl;
		cout << "Nhap he so: ";
		cin >> SH[i].HeSo;
		cout << "Nhap so mu: ";
		cin >> SH[i].SoMu;
	}
	cout << "Nhap gia tri x = ";
	cin >> x;
	for (int i = 0; i < n; i++)
	{
		y = y + SH[i].HeSo * pow(x, SH[i].SoMu);
	}
	cout << "Gia tri da thuc tai x = " << x << " la: y = " << y;
}