C# String.Compare 方法测试

using System;

namespace C_9_4
{
    class Program
    {

        //类型声明应放在main函数前面
        static void Main(string[] args)
        {
            //String.Compare比较顺序，AaBbCc.....(区分大小写的情况)
            //当str1大于str2->1
            //str1==str2-->0
            //str1<str2-->-1
            string a, b ,aa, bb,aaa,bbb;
            string c, d,cc,dd;
            int jiance;
            a = "abc";
            b = "abd";

            aa = "ab";
            bb = "abc";

            aaa = "A";
            bbb = "a";

            c = "cbc";
            d = "abc";

            cc = "abc";
            dd = "Ab";

            jiance = String.Compare(a, b);
             Console.WriteLine("结果={0}\n",jiance );
            //a,b做比较，得到结果这是顺序比较从左往右

            jiance = String.Compare(aa, bb);
            Console.WriteLine("结果={0}\n", jiance);
            //aa,bb作比较，证明多一位的数据的更小。

            jiance = String.Compare(aaa, bbb);
            Console.WriteLine("结果={0}\n", jiance);
            //aaa,bbb作比较，证明a比A大
            //但是如果不区分大小写
            jiance = String.Compare(aaa,bbb,true );
            //文件格式是String.Compare(string1,string2,ignorCase);//ture 忽略大小写 false大小写敏感
            Console.WriteLine("结果={0}\n", jiance);

            jiance = String.Compare(c, d );
            Console.WriteLine("结果={0}\n", jiance);
            //c,d作比较说明是从左向右作比较的，优先判断左边，如有结果就直接输出，不管后面的了

            jiance = String.Compare(cc, dd, true);
            Console.WriteLine("结果={0}\n", jiance);
            //忽略大小写以后数据判断规律没变化
        }
    }
}