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            Beginner with c# 4

            發(fā)布: 2007-6-30 23:38 | 作者: admin | 來(lái)源: | 查看: 10074次 | 進(jìn)入軟件測試論壇討論

            領(lǐng)測軟件測試網(wǎng) 1&iexcl;&pound;4 &Ocirc;¤&para;¨&Ograve;&aring;&Agrave;à&ETH;&Iacute;&pound;¨Predefined types&pound;&copy;

            c#&Igrave;á&sup1;&copy;&Aacute;&Euml;&Ograve;&raquo;&Iuml;&micro;&Aacute;&ETH;&Ocirc;¤&para;¨&Ograve;&aring;&Agrave;à&ETH;&Iacute;&iexcl;&pound;&Euml;ü&Atilde;&Ccedil;&Oacute;&euml;c/c++&Oacute;&ETH;&sup2;&raquo;&Eacute;&Ugrave;&Iuml;à&Euml;&AElig;&micro;&Auml;&micro;&Oslash;·&frac12;&iexcl;&pound;&Ocirc;¤&para;¨&Ograve;&aring;&Ograve;&yacute;&Oacute;&Atilde;&Agrave;à&ETH;&Iacute;&Oacute;&ETH;object&ordm;&Iacute;string&iexcl;&pound;
            object&Agrave;à&ETH;&Iacute;&Ecirc;&Ccedil;&Euml;ù&Oacute;&ETH;&AElig;&auml;&Euml;&ucirc;&Agrave;à&ETH;&Iacute;&micro;&Auml;&raquo;ù&acute;&iexcl;&iexcl;&pound;

            &Ocirc;¤&para;¨&Ograve;&aring;&Agrave;à&ETH;&Iacute;°ü&Agrave;¨·&ucirc;&ordm;&Aring;&Ecirc;&yacute;&iexcl;&cent;&Icirc;&THORN;·&ucirc;&ordm;&Aring;&Ecirc;&yacute;&iexcl;&cent;&cedil;&iexcl;&micro;&atilde;&iexcl;&cent;&sup2;&frac14;&para;&ucirc;&iexcl;&cent;×&Ouml;·&ucirc;&ordm;&Iacute;&Ecirc;&reg;&frac12;&oslash;&Ouml;&AElig;&Ecirc;&yacute;&iexcl;&pound;·&ucirc;&ordm;&Aring;&Ecirc;&yacute;&Oacute;&ETH;&pound;&ordm;sbyte&iexcl;&cent;short&iexcl;&cent;
            int&ordm;&Iacute;long&pound;&raquo;&Icirc;&THORN;·&ucirc;&ordm;&Aring;&Ecirc;&yacute;&Oacute;&ETH;&pound;&ordm;byte&iexcl;&cent;ushort&iexcl;&cent;uint&ordm;&Iacute;ulong&pound;&raquo;&cedil;&iexcl;&micro;&atilde;&Ecirc;&yacute;&Oacute;&ETH;&pound;&ordm;float&ordm;&Iacute;double&iexcl;&pound;

            &sup2;&frac14;&para;&ucirc;&Agrave;à&ETH;&Iacute;&frac34;&Iacute;&Iuml;&ntilde;&Ograve;&raquo;&cedil;&ouml;&iquest;&ordf;&sup1;&Oslash;&pound;&not;&Ouml;&raquo;&Oacute;&ETH;&Aacute;&frac12;&Ouml;&Ouml;×&acute;&Igrave;&not;&pound;&ordm;true&raquo;òfalse&iexcl;&pound;c#&para;&Ocirc;&sup2;&frac14;&para;&ucirc;&micro;&Auml;&Ograve;&ordf;&Ccedil;ó±&Egrave;c/c++&Ntilde;&Iuml;&cedil;&ntilde;&pound;&not;&Oacute;&euml;java&Agrave;à&Euml;&AElig;&iexcl;&pound;
            &Ocirc;&Uacute;c#&Ouml;&ETH;false&sup2;&raquo;&micro;&Egrave;&Oacute;&Uacute;0&pound;&not;true&Ograve;&sup2;&sup2;&raquo;&micro;&Egrave;&Oacute;&Uacute;1&pound;&raquo;false&ordm;&Iacute;true&para;&frac14;&Ecirc;&Ccedil;&micro;&yen;&para;&Agrave;·&Ouml;&Agrave;&euml;&sup3;&ouml;&Agrave;&acute;&micro;&Auml;&Ograve;&raquo;&cedil;&ouml;&Ouml;&micro;&iexcl;&pound;&Ntilde;§&sup1;&yacute;c/c++&micro;&Auml;&Iacute;&oslash;&Oacute;&Ntilde;
            &para;&frac14;&Ouml;&ordf;&micro;&Agrave;&pound;&ordm;*/
            int i = 0;
            if (i = 0) { // Bug: &Oacute;&brvbar;&cedil;&Atilde;&Ecirc;&Ccedil; (i == 0)
            ....
            }
            /* &Ecirc;&Ccedil;&Atilde;&raquo;&Oacute;&ETH;&Icirc;&Ecirc;&Igrave;&acirc;&micro;&Auml;&iexcl;&pound;&micro;&laquo;&Ocirc;&Uacute;c#&Ouml;&ETH;&raquo;á&Ograve;&yacute;·&cent;&Ograve;&raquo;&cedil;&ouml;±à&Ograve;&euml;&acute;í&Icirc;ó&pound;¨error CS0029: Cannot implicitly convert
            type @#int@# to @#bool@#&pound;&copy;&iexcl;&pound;&micro;±&Egrave;&raquo;&pound;&not;&Otilde;&acirc;&Ntilde;ù&Icirc;&thorn;&Eacute;ü&Aacute;&Euml;&Ograve;&raquo;&micro;&atilde;&Atilde;&raquo;&Oacute;&ETH;±&Oslash;&Ograve;&ordf;&micro;&Auml;&Aacute;é&raquo;&icirc;&ETH;&Ocirc;&iexcl;&pound;&Icirc;&Ograve;&Atilde;&Ccedil;&Ocirc;&Ugrave;&Ograve;&sup2;&sup2;&raquo;&Auml;&Uuml;&Otilde;&acirc;&Ntilde;ù&pound;&ordm;*/
            string str;
            ....
            if(str = Console.ReadLine()) {
            Console.WriteLine("Your comments are: {0}",str);
            ....
            /* &para;&oslash;±&Oslash;&ETH;&euml;&pound;&ordm;*/
            using System;
            class BoolTest
            {
            static void Main() {
            string str = Console.ReadLine();//&Ograve;&sup2;&iquest;&Eacute;&Ograve;&Ocirc;&pound;&ordm;string str;
            if(str == "") // if((str = Console.ReadLine()) == "")
            Console.WriteLine("i can@#t read your comments. Please tell me something! O.K.?");
            else
            Console.WriteLine("Your comments are: {0}",str);
            }
            }
            /*
            &Icirc;&Ograve;&sup3;&shy;&Aacute;&Euml;&Ograve;&raquo;&Otilde;&Aring;&Ocirc;¤&para;¨&Ograve;&aring;&Agrave;à&ETH;&Iacute;&micro;&Auml;&frac14;ò±í&sup1;&copy;&acute;ó&frac14;&Ograve;&sup2;&Icirc;&iquest;&frac14;&iexcl;&pound;

            Type Description Examples

            object The ultimate base type of all other types object o = new Stack();

            string String type; a string is a sequence of string s = "Hello";
            Unicode characters

            sbyte 8-bit signed integral type sbyte val = 12;

            short 16-bit signed integral type short val = 12;

            int 32-bit signed integral type int val = 12;

            long 64-bit signed integral type long val1 = 12;
            long val2 = 34L;

            byte 8-bit unsigned integral type byte val1 = 12;
            byte val2 = 34U;

            ushort 16-bit unsigned integral type ushort val1 = 12;
            ushort val2 = 34U;

            uint 32-bit unsigned integral type uint val1 = 12;
            uint val2 = 34U;

            ulong 64-bit unsigned integral type ulong val1 = 12;
            ulong val2 = 34U;
            ulong val3 = 56L;
            ulong val4 = 78UL;

            float Single-precision floating point type float value = 1.23F;

            double Double-precision floating point type double val1 = 1.23
            double val2 = 4.56D;

            bool Boolean type; a bool value is either bool value = true;
            true or false

            char Character type; a char value is a Unicode char value = @#h@#;
            character

            decimal Precise decimal type with 28 significant digits decimal value = 1.23M;

            &Auml;&atilde;&Ograve;&sup2;&iquest;&Eacute;&Ograve;&Ocirc;×&Ocirc;&para;¨&Ograve;&aring;×&Ocirc;&frac14;&ordm;&micro;&Auml;&Ocirc;¤&para;¨&Ograve;&aring;&Agrave;à&ETH;&Iacute;&pound;&not;&iquest;&Eacute;&Ograve;&Ocirc;&Otilde;&acirc;&Ntilde;ù&pound;&ordm;*/
            using System;
            struct Digit
            {...}
            class Test
            {
            static void TestInt() {
            int a = 1;
            int b = 2;
            int c = a + b;
            Console.WriteLine(c);
            }
            static void TestDigit() {
            Digit a = (Digit) 1;
            Digit b = (Digit) 2;
            Digit c = a + b;
            Console.WriteLine(c);
            }
            static void Main() {
            TestInt();
            TestDigit();
            }
            }
            /*
            &Otilde;&acirc;&Ograve;&raquo;&frac12;&Uacute;&Oacute;&ETH;&micro;&atilde;&sup3;&Aacute;&Atilde;&AElig;&iexcl;&pound;&pound;&ordm;&pound;¨

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