using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace bt_62
{
class Program
{
static void Main(string[] args)
{
int diem;
do
{
Console.Write("nhap diem cua sinh vien:"); diem = int.Parse(Console.ReadLine());
} while (diem < 0 || diem > 100);
if (diem >= 80)
Console.Write("loai A");
else
{
if (diem >= 60 && diem < 80)
Console.Write("loai B");
else
{
if (diem >= 40 && diem < 60)
Console.Write("loai C");
else
Console.Write("loai D");
}
}
Console.ReadKey();
}
}
}
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace bt_62
{
class Program
{
static void Main(string[] args)
{
int diem;
do
{
Console.Write("nhap diem cua sinh vien:"); diem = int.Parse(Console.ReadLine());
} while (diem < 0 || diem > 100);
if (diem >= 80)
Console.Write("loai A");
else
{
if (diem >= 60 && diem < 80)
Console.Write("loai B");
else
{
if (diem >= 40 && diem < 60)
Console.Write("loai C");
else
Console.Write("loai D");
}
}
Console.ReadKey();
}
}
}