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const S1: ShortString = ‘Hello World‘;var X: Integer; SP: PChar; S2: string; RS: string; { 显示最后的结果}begin SP := ‘Pchar‘; //copy函数获取从最后一个字符开始，共一个字符 S2 := Copy(S1, Length(S1), 1); { S2 = ‘d‘} RS := RS + S2 + #13#10; //删除字符串中指定位置字符的Delete函数 S2 := S1; Delete(S2, 1, 1); { S2 = ‘ello World‘} RS := RS + S2 + #13#10; //格式化字符串Format函数 S2 := Format(‘Time is : %d:%d:%d‘, [12, 15, 40]); { S2 = ‘Time is : 12:15:40‘} {%d表示将在这里放置一个整数，[2011]表示放置2011这个数值} RS := RS + S2 + #13#10; //数值转换为字符串InttoStr函数 X := 65535; S2 := IntToStr(X); { S2 = ‘10‘} RS := RS + S2 + #13#10; //获取字符串长度Length函数 X := Ord(S1[0]); { X = 11} X := Length(S1); { 因为S1为ShortString类型，所以可以通过S1[0]来获取字符长度} RS := RS + IntToStr(X) + #13#10; //转化为小写LowerCase函数 S2 := LowerCase(S1); { S2 = ‘hello world‘} RS := RS + S2 + #13#10; //转化为大写UpperCase函数 S2 := UpperCase(S1); { S2 = ‘HELLO WORLD‘} RS := RS + S2 + #13#10; //返回指定字符重复的字符串 S2 := StringOfChar(‘A‘, 10); { S2 = ‘AAAAAAAAAA‘} RS := RS + S2 + #13#10; //StrPas把一个空结尾字符串(PChar或字符数组)转化为Pascal字符串 S2 := StrPas(SP); { S2 = ‘Pchar‘} RS := RS + S2 + #13#10; //StrPCopy把一个Pascal字符串转化为空结尾字符串 StrPCopy(SP, ‘World Hello‘); { SP = ‘World Hello‘} RS := RS + StrPas(SP) + #13#10; //Trim用于去除字符串前后的空格和控制字符 S2 := #13#10‘ Hello World ‘; S2 := Trim(S2); { S2 = ‘Hello World‘} RS := RS + S2 + #13#10; //StringReplace用于替换字符串中制定字符 S2 := ‘AABBCC‘; S2 := StringReplace(S2, ‘A‘, ‘E‘, [rfReplaceAll]); RS := RS + S2 + #13#10; ShowMessage(RS);end; |
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原文地址：http://www.cnblogs.com/BillLei/p/4286041.html
