[英]Use of List<T> in C#
我不得不練習用C#編寫一個小程序。 我必須輸入幾個名稱,如果names.count == 1,則僅顯示:
"aName Liked post."
if names.count ==2 then:
"aName and bName liked post."
if names.count > 2 then (for example count == 5):
"aName, bName and 3 others liked post."
> 2和== 1可以正常工作,但是當有2個名稱,即== 2時,會拋出未處理的異常:
“ 未處理的異常:System.FormatException:索引(從零開始)必須大於或等於零且小於參數列表的大小 ”
var names = new List<string>();
while (true)
{
Console.WriteLine("Enter name or hit ENTER to quit:");
var input = Console.ReadLine();
if (String.IsNullOrWhiteSpace(input))
{
break;
}
names.Add(input);
}
if (names.Count > 2)
{
Console.WriteLine("{0},{1} and {2} others liked your post.",names[0], names[1], names.Count-2);
} else if (names.Count == 2)
{
Console.WriteLine("{0} and {1} liked your post.", names[0], names[1]);
}
else if (names.Count == 1)
{
Console.WriteLine("{0} liked your post.", names[0]);
}
else
{
Console.WriteLine("No one liked");
}
更改
Console.WriteLine("{0} and {2} liked your post.", names[0], names[1]);
至
Console.WriteLine("{0} and {1} liked your post.", names[0], names[1]);
{2}
表示“將第三個參數插入此處”。 但是您真的想通過第二。
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