#代碼
Console.WriteLine("輸入班級人數(shù)");

int a = Convert.ToInt32(Console.ReadLine());

int i = 0;

int sum = 0;

while (i < a)

{

Console.WriteLine("輸入第{0}個學員的成績", i + 1);

try

{

int score = Convert.ToInt32(Console.ReadLine()); sum += score;

i++;

}

catch

{

Console.WriteLine("輸入有誤，請重新輸入");

}

}

Console.WriteLine("{0}個人的班總成績是{1}平均成績是{2}",a, sum, sum / a);

Console.ReadKey();

#效果

圖片發(fā)自簡書App