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  • .net out ref

    public void ChangeStringBuilder1(StringBuilder str)
    {
    str.Append("yes");
    }

    public void ChangeStringBuilder2(ref StringBuilder str)
    {
    str.Append("yes");
    }

    public void ChangeStringStr1(string str)
    {
    str += "yes";
    }

    public void ChangeStringStr1(ref string str)
    {
    str += "yes";
    }

    public void ChangeStringStr2(out string str)
    {
    string strTemp = "ok";
    str = strTemp + "yes";
    }

    static void Main(string[] args)
    {
    StringBuilder strBuilder1 = new StringBuilder("str1");
    StringBuilder strBuilder2 = new StringBuilder("str2");
    new Program().ChangeStringBuilder1(strBuilder1);
    new Program().ChangeStringBuilder1(strBuilder2);
    Console.WriteLine(strBuilder1.ToString());
    Console.WriteLine(strBuilder2.ToString());

    string str1 = "str1";
    string str2 = "str2";
    string str3 = "str3";
    new Program().ChangeStringStr1(str1);
    new Program().ChangeStringStr1(ref str3);
    new Program().ChangeStringStr2(out str2);
    Console.WriteLine(str1.ToString());
    Console.WriteLine(str2.ToString());
    Console.WriteLine(str3.ToString());

    }

    结果:

    str1yes
    str2yes
    str1
    okyes
    str3yes
    Press any key to continue . . .

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  • 原文地址:https://www.cnblogs.com/2814/p/2848927.html
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