1.
int sum1 = 0;
for (int i = 1; i < 66; i++)
{
sum1 += i;
}
--------------------------------------------------
2.
int sum2 = 0;
for (int i = 2; i < 101; i += 2)
{
sum2 += i;
}
--------------------------------------------------
3.
string input = Console.ReadLine();
try
{
int number = Convert.ToInt32(input);
if (number < 60)
{
Console.WriteLine("分数小于60,不及格!");
}
else
{
Console.WriteLine("分数及格!");
}
}
catch (Exception)
{
Console.WriteLine("请输入纯数字字符串!");
}
Console.ReadKey();
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追答1720406057
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追答QFree