Code Java bị lỗi

Tình hình là mình code y chang sách mà ko hiểu sao eclipse ko nhận mà bảo lỗi, anh em giúp mình với, cảm tạ
Code:

 import input.MyInput;
import java.io.*;
public class sinhvien {
	public String hoTen;
	public String diachi;
	public String Monhoc;
	private float diemMH;
	static int siSO;
	public sinhvien() {
}
	public sinhvien(String hTen, String dChi,String mHoc,float dMH)
	{
		hoTen = hTen;
		diachi = dChi;
		Monhoc = mHoc;
		diemMH = dMH;
		siSO++;
	}
	public void nhapTin() {
		System.out.print("	Ho ten sinh vien:");
		hoTen = input.MyInput.readString();
		System.out.println("	Dia chi   :");
		diachi = input.MyInput.readString();
		System.out.print("	Mon hoc     :");
		Monhoc = input.MyInput.readString();
		System.out.print("	Diem mon hoc   :");
		diemMH = input.MyInput.readFloat ();
	}
	public void hienThi () {
		System.out.println("	Ho ten sinh vien:" + hoTen);
		System.out.println("	Dia chi:        " + diachi);
		System.out.println("	Mon hoc:        " + Monhoc);
		System.out.println("	Diem mon hoc:   " + diemMH);
	}
	public void setDiem(float d) {
		diemMH = d;
	}
	public float getDiem () {
		return diemMH;
	}
	public static void main(String [] args) {
		sinhvien sv = new sinhvien();
		System.out.println(" ---Nhap thong tin cua sinh vien ---
");
		sv.nhapTin();
		System.out.println(" ---Thong tin sinh vien da nhap ---
");
		sv.hienThi ();
	}
}

Console:

---Nhap thong tin cua sinh vien ---

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
	input cannot be resolved
	input cannot be resolved
	input cannot be resolved
	input cannot be resolved

	at sinhvien.nhapTin(sinhvien.java:21)
	at sinhvien.main(sinhvien.java:44)