讲的是read这个函数的用法,把文本文件f1里的内容复制到f2里去!
procedure TForm1.Button15Click(Sender: TObject);
var
f1,f2:textfile;
ch:char;
begin
if opendialog1.Execute then
begin
assignfile(f1,opendialog1.FileName);
if savedialog1.Execute then
begin
assignfile(f2,savedialog1.filename) ;
rewrite(f2);
while not eof(f1) do
begin
read(f1,ch) ;
write(f1,ch);
end;
closefile(f2) ;
end;
closefile(f1) ;
end;
end;end.
请大家修改错误的地方!
procedure TForm1.Button15Click(Sender: TObject);
var
f1,f2:textfile;
ch:char;
begin
if opendialog1.Execute then
begin
assignfile(f1,opendialog1.FileName);
if savedialog1.Execute then
begin
assignfile(f2,savedialog1.filename) ;
rewrite(f2);
while not eof(f1) do
begin
read(f1,ch) ;
write(f1,ch);
end;
closefile(f2) ;
end;
closefile(f1) ;
end;
end;end.
请大家修改错误的地方!
procedure TForm1.Button15Click(Sender: TObject);
var
f1,f2:textfile;
ch:char;
begin
if opendialog1.Execute then
begin
assignfile(f1,opendialog1.FileName);
if savedialog1.Execute then
begin
assignfile(f2,savedialog1.filename) ;
rewrite(f2);
while not eof(f1) do
begin
read(f1,ch) ;
write(f2,ch);
end;
closefile(f2) ;
end;
closefile(f1) ;
end;
end;end.
提示 是while那行!!
Ch: Char;
begin
if OpenDialog1.Execute then begin
AssignFile(F1, OpenDialog1.Filename);
Reset(F1); <----------------------例子上可以这行哦^-^
if SaveDialog1.Execute then begin
AssignFile(F2, SaveDialog1.Filename);
Rewrite(F2);
while not Eof(F1) do
begin
Read(F1, Ch);
Write(F2, Ch);
end;
CloseFile(F2);
end;
CloseFile(F1);
end;end;
这里我还有点疑惑
while not Eof(F1) do
begin
Read(F1, Ch);
Write(F2, Ch);
end;
这个循环是怎么进行下一步的?读写的时候是一个字节一个字节的读写的?默认从第一个字节开始读,然后循环一次就读下一个字节吗?
var F1, F2: TextFile;
Ch: Char;
begin
if OpenDialog1.Execute then begin
AssignFile(F1, OpenDialog1.Filename);
Reset(F1); <----------------------例子上可以这行哦^-^
if SaveDialog1.Execute then begin
AssignFile(F2, SaveDialog1.Filename);
Rewrite(F2);
while not Eoln(F1) do
begin
Readln(F1, Ch);
Writeln(F2, Ch);
end;
CloseFile(F2);
end;
CloseFile(F1);
end;end;