求助,这个哪错了
namespace projAboveAvg
{
class Program
{
static void Main(string[] args)
{
string[,] couple = new string{ {"景珍","90"},{"林惠阳","65"},{"成蓉","88"},{"洪南昌","70"},{"龙玉民","46"},{"单江开","81"},{"田武山","100"},{"王三明","68"} };
int sum=0;
for(int i=0; i<couple.GetLongLength(0); i++)
{
sum += couple[i,1];
}
int avg = sum/8;
Console.Write("平均分是{0},高于平均分的有:",avg);
for(int i=0; i<couple.GetLongLength(0); i++)
{
if(couple[i,1]>avg)
Console.WriteLine(couple[i,0]);
}
}
}
}