将一个文本文件复制到另一个文件 [英] Copying one text file to another

问题描述

我编写了一个C ++程序，它应该将一个文本文件复制到另一个文件。

如果我指定要打开和复制的文件但是当我支持$ b $时工作正常b尝试让用户输入的文件名不起作用，而且我是b
bumped。谁能让我知道我错过了什么？


这是我的代码：

#include< iostream>

#include< fstream>

#include< cstdlib>

#include< string>

using namespace std;


int main（）

{

string source;

string clone;

cout<< 输入源文件：";

cin>>来源;

cout<< 输入新文件的名称：" ;;

cin>>克隆;


ifstream in（source.c_str）; //打开阅读

ofstream out（clone.c_str）; //开放写作

string s;

while（getline（in，s））

out<< s<< " \ n";


返回0;

}

解决方案

< BLOCKQUOTE>" Gactimus" < GA ****** @ xrs.net>在消息中写道

news：1100651820.dZSrLYW+T41iUYlgGChJng@bubbanews ..。

我写了一个C ++程序，它应该将一个文本文件复制到另一个文本文件。
如果我指定要打开和复制的文件，但是当我试图让用户输入文件名时，它工作正常并且我感到难过。谁能让我知道我错过了什么？

这是我的代码：

ifstream in（source.c_str）; //打开阅读
ofstream out（clone.c_str）; //打开写入

ifstream in（source.c_str（））;

ofstream out（clone.c_str（））; < br $>

-

ES Kim

" ES Kim" < [e-mail]>在新闻中写道：cn ********** @ news1.kornet.net:

" Gactimus" < GA ****** @ xrs.net>在消息中写道
新闻：1100651820.dZSrLYW+T41iUYlgGChJng@bubbanews ..

我写了一个C ++程序，应该将一个文本文件复制到
另一个。如果我指定要打开和复制的文件，它可以正常工作
但是当我尝试让用户输入文件名时它不会工作而且我很难过。谁能让我知道我错过了什么？

这是我的代码：

ifstream in（source.c_str）; //打开阅读
ofstream out（clone.c_str）; //打开写入

ifstream（source.c_str（））;
ofstream out（clone.c_str（））;

D''哦！这总是让你愚蠢的错误。谢谢。

一个更快的方法是一次读取所有文件（不循环遍布

行），也许它不会是一个可重新计算的差异，无论如何你可以使用

getline（in，s，char（0））;

char（0）是空字符，所以分隔符是空字符（当

不再阅读字符时）。

" Gactimus" < GA ****** @ xrs.net>在消息中写道

news：1100651820.dZSrLYW+T41iUYlgGChJng@bubbanews ..。

我写了一个C ++程序，它应该将一个文本文件复制到另一个文本文件。
如果我指定要打开和复制的文件，但是当我试图让用户输入文件名时，它工作正常并且我感到难过。谁能让我知道我错过了什么？

这是我的代码：

#include< iostream>
#include< fstream>
#include< cstdlib>
#include< string>
使用命名空间std;

int main（）
{
字符串来源;
字符串克隆;

cout<< 输入源文件：";
cin>>来源;
cout<< 输入新文件的名称：";
cin>>克隆;

ifstream in（source.c_str）; //打开阅读
ofstream out（clone.c_str）; //打开写作
字符串s;
while（getline（in，s））
out<< s<< 返回0;
}

I wrote a C++ program that is supposed to copy one text file to another.
It works fine if I specify the files to be opened and copied but when I
try to have the file names inputted by the user it doesn''t work and I am
stumped. Can anyone clue me in to what I am missing?

Here is my code:
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;

int main()
{
string source;
string clone;

cout << "Enter the source file: ";
cin >> source;
cout << "Enter the name of the new file: ";
cin >> clone;

ifstream in(source.c_str); // Open for reading
ofstream out(clone.c_str); // Open for writing
string s;
while(getline(in, s))
out << s << "\n";

return 0;
}

解决方案

"Gactimus" <ga******@xrs.net> wrote in message
news:1100651820.dZSrLYW+T41iUYlgGChJng@bubbanews.. .

I wrote a C++ program that is supposed to copy one text file to another.
It works fine if I specify the files to be opened and copied but when I
try to have the file names inputted by the user it doesn''t work and I am
stumped. Can anyone clue me in to what I am missing?

Here is my code:

ifstream in(source.c_str); // Open for reading
ofstream out(clone.c_str); // Open for writing

ifstream in(source.c_str());
ofstream out(clone.c_str());

--
ES Kim

"ES Kim" <[e-mail]> wrote in news:cn**********@news1.kornet.net:

"Gactimus" <ga******@xrs.net> wrote in message
news:1100651820.dZSrLYW+T41iUYlgGChJng@bubbanews.. .

I wrote a C++ program that is supposed to copy one text file to
another. It works fine if I specify the files to be opened and copied
but when I try to have the file names inputted by the user it doesn''t
work and I am stumped. Can anyone clue me in to what I am missing?

Here is my code:

ifstream in(source.c_str); // Open for reading
ofstream out(clone.c_str); // Open for writing

ifstream in(source.c_str());
ofstream out(clone.c_str());

D''oh! It''s always the stupid mistakes that get you. Thanks.

a faster way would be reading all the file at once ( not looping throughout
lines), maybe it would not be a remarquable difference, anyway you can use
getline(in,s,char(0));
char(0) is the null character, so the delimiter is the null character ( when
reading no more characters).
"Gactimus" <ga******@xrs.net> wrote in message
news:1100651820.dZSrLYW+T41iUYlgGChJng@bubbanews.. .

I wrote a C++ program that is supposed to copy one text file to another.
It works fine if I specify the files to be opened and copied but when I
try to have the file names inputted by the user it doesn''t work and I am
stumped. Can anyone clue me in to what I am missing?

Here is my code:
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;

int main()
{
string source;
string clone;

cout << "Enter the source file: ";
cin >> source;
cout << "Enter the name of the new file: ";
cin >> clone;

ifstream in(source.c_str); // Open for reading
ofstream out(clone.c_str); // Open for writing
string s;
while(getline(in, s))
out << s << "\n";

return 0;
}

这篇关于将一个文本文件复制到另一个文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！