如何删除字符串中的字符? [英] How to delete characters of a string?

问题描述

您好，我想知道如何删除字符串的字符，例如，删除该字符串的字符0和4.

Hello, i want know how can i delete characters of an string, for example, delete the characters 0 and 4 of this string.

string frase  = "Ayer estaba solo";

最好的问候
ÁngelManuel

Best regards
Ángel Manuel

推荐答案

要删除0，请尝试以下操作-

To delete 0 try something like this -

while(frase.indexof(0)!=-1)
{
frase.Remove(frase.indexOf(0));
}

您可以参数化此方法以传递所有值.

You can paramterize this method to pass all values.

方法如下:

Here is how:

string frase  = "Ayer estaba solo";
System.Text.StringBuilder sb = new System.Text.StringBuilder(frase);
sb.Remove(1, 4);
frase = sb.ToString();

使用StringBuilder来提高速度很重要，即使简单的串联也比使用字符串快.方法string.Format的速度也快于等效字符串的连接.

注意！ OP将标签从C#更改为C ++.我对此不承担任何责任.当标签为C#时，我的回答是在C#中.请不要以此为基础进行否决.

—SA

It''s important to use StringBuilder for speed, even simple concatenations are faster then with string. The method string.Format is also faster then string equivalent concatenations.

Attention! OP changed a tag from C# to C++. I cannot be hold responsible for that. My answer was in C# when the tag was C#. Please do not down-vote based on that.

—SA

使用擦除功能:从指定位置删除字符串中的一个元素或一系列元素.

字符串frase ="Ayer estaba solo";
frase.erase(0,1);
第一个参数是
_Pos:要删除的字符串中第一个字符的索引.
_Count:如果在以_Pos开头的字符串范围内，则删除的元素数.

Use erase function : Removes an element or a range of elements in a string from a specified position.

string frase = "Ayer estaba solo";
frase.erase(0,1);
First param is
_Pos: The index of the first character in the string to be removed.
_Count: The number of elements that will be removed if there are as many in the range of the string beginning with _Pos.

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