c#如何通过索引提取字符串中的特定字符
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How extract a specific character in a string in c# by index
提问by Mohammad Reza Rezwani
In c++ strings are like array when you write str[i] you can acsess i+1 element of array in there something like that in c# I do not need indexOf method because that is different I need something to bring characters in string by their index
在 c++ 中，字符串就像数组，当你写 str[i] 时，你可以访问数组的 i+1 元素，就像在 c# 中那样，我不需要 indexOf 方法，因为那是不同的，我需要一些东西通过索引将字符带入字符串
采纳答案by Karl Anderson
Yes, you can reference characters of a string using the same syntax as C++, like this:
是的，您可以使用与 C++ 相同的语法来引用字符串的字符，如下所示：
string myString = "dummy";
char x = myString[3];
Note: xwould be assigned m.
注意：x将被分配m。
You can also iterate using a forloop, like this:
您还可以使用for循环进行迭代，如下所示：
char y;
for (int i = 0; i < myString.Length; i ++)
{
y = myString[i];
}
Finally, you can use the foreachloop to get a value already cast to a char, like this:
最后，您可以使用foreach循环获取已转换为 a 的值char，如下所示：
foreach(char z in myString)
{
// z is already a char so you can just use it here, no need to cast
}
回答by RichieHindle
It's just the same in C#: s[n]gets you character number nof string s.
在 C# 中也是一样：s[n]让你得到nstring 的字符数s。
