新手问题（关于访问数组的）

[Shryap]

本人想以写一个方法访问string[] str={"+","-","*","/"}这组数组，如果方法里所输入的字符串与数组里的某元素相同就返回true,否则返回一个false.请各路高手赐教。

[风之影子]

        private bool Oper(string tempOper)
        {
            bool boolean = false;
            string[] str ={ "+", "-", "*", "/" };
            for (int count = 0; count < str.Length; count++)
            {
                if (str[count] == tempOper)
                {
                    boolean = false;
                    break;
                }
            }
            return boolean;
        }

[-过客-]

转为List，用List的Contains方法就可以了

List<string> list = new List<string>(new string[] { "+", "-", "*", "/" });
if (list.Contains(textBox1.Text))
    richTextBox2.Text = "true";
else
    richTextBox2.Text = "false";

[风之影子]

1楼的方法小改一下:

        private bool Oper(string tempOper)
        {
            bool boolean = false;
            string[] str ={ "+", "-", "*", "/" };
            for (int count = 0; count < str.Length; count++)
            {
                if (str[count] == tempOper)
                {
                    boolean = true;
                    break;
                }
            }
            return boolean;
        }

[风之影子]

版主:真快,我刚才还看见了一个招聘贴,转眼就不在了.

[lzsh0622]

public bool isExist(string s)
{
    string[] str ={ "+", "-", "*", "/" };
    return Array.IndexOf(str, s) >=0;
}

[SQL77]

INDEXOF()
CONTAINS()都行

[bingningwt]

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication4
{
class Program
{
public bool means(string a)
{
bool flag=true;
string[] str = new string[4] { "+", "-", "*", "/" };
int j;
for (int i = 0; i < a.Length; i++)
{
for (j = 0; j < 4; j++)
{
if ((a[i]) == (str[j]))
{
flag = true;
break;
}
else
flag = false;
}
}
Console.WriteLine("{0}", flag);
return flag;
}
static void Main(string[] args)
{
Program m=new Program();
string a = Console.ReadLine();
m.means(a);
Console.ReadLine();
}
}
}