string [,]st=new string[8,2];
long aver;
int sum = 0;
for (int i = 0; i < st.GetLongLength(0); i++)
{
st[i,0]=Console.ReadLine();
st[i,1] = Console.ReadLine();
sum += int.Parse(st[i, 1]);
}
aver = sum / st.GetLongLength(0);
Console.WriteLine("平均分是{0}，高于平均分的有：", aver);
for...
