有大佬懂么，for循环和forech循环嗯会。就是这个whi

萌新路过，不懂帮顶

你这个变量定义的。。。

While就是只判断0或者1。我也是萌新，详细的百度一下。或者看视频。

List<int> chengji = new List<int>();
int zuigaofen = 0;
int zuidifen = 0;
int zongfen = 0;
chengji.Add(70);
chengji.Add(80);
chengji.Add(60);
chengji.Add(90);
int a = 0;
while (a < chengji.Count)
{
if (chengji[a] > zuigaofen)
{
zuigaofen = chengji[a];
}
if (a == chengji.Count - 1)
{
if (chengji[a] < zuidifen)
{
zuidifen = chengji[a];
}
}
else
{
if (chengji[a] < chengji[a + 1])
{
zuidifen = chengji[a];
}
}
zongfen += chengji[a];
a++;
}
double pingjunfen = (double)zongfen / chengji.Count;