åè½è¯´æï¼ä»¥å¯åæ¹å¼æå¼æ件ãå¦ææ件ä¸åå¨ï¼å°ä¼èªå¨å建ã使ç¨è¯¥å½æ°ï¼å°ä¼è¦çæ件ä¸çææå
容ã
åèå®ä¾ï¼
var
F: TextFile; // 声æææ¬æ件类ååé
begin
AssignFile(F, 'C:\MyFile.txt'); // å°C:\MyFile.txtæ件ä¸Fåé建ç«è¿æ¥ï¼åé¢å¯ä»¥ä½¿ç¨Fåé对æ件è¿è¡æä½ã
Rewrite(F); // æå¼æ件ãå¦ææ件ä¸åå¨ï¼å°ä¼å¨Cçä¸å建MyFile.txtæ件ãå¦ææ件åå¨ï¼å°ä¼è¦çMyFile.txtä¸çææå
容ã
end;
+++++++++++++++++
Append
åè½è¯´æï¼è¿½å å
容å°æ件ä¸ãæ件å¿
é¡»è¦åå¨ã
åèå®ä¾ï¼
var
S: String;
F: TextFile;
begin
S := 'This is a book.';
AssignFile(F, 'C:\MyFile.txt'); // å°C:\MyFile.txtæ件ä¸Fåé建ç«è¿æ¥ï¼åé¢å¯ä»¥ä½¿ç¨Fåé对æ件è¿è¡æä½ã
Append(F); // 以追å çæ¹å¼æå¼æ件
Writeln(F, S); // å°Såéä¸çå
容追å å°ææ¬å°¾åã
CloseFile(F); // å
³éæ件
end;
++++++++++++++++++++++++
//å¤ææ件æ¯å¦åå¨ FileExists
var
f: string;
begin
f := 'c:\temp\test.txt';
if not FileExists(f) then
begin
//å¦ææ件ä¸åå¨
end;
end;
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