如何在C ++中拆分文件格式的文件 [英] How to split a file with file format in C++

问题描述

我一直在寻找使用C ++分割任何文件格式的文件的解决方案。到目前为止我发现并尝试过，只能拆分.txt文件。可以将（例如.docx）文件拆分为2个文件，但打开拆分文件会出错。其他文件格式也是如此。例如，尝试下面的代码使用不同的文件扩展名而不是.txt或.dat（比如.jpg）。



是否有人可以帮助我？< br $>


最好的问候，



我尝试过的事情：

I've been looking for a solution to split a file with any file format, using C++. what i've found so far and tried as well, could only split .txt file. To split (say .docx) file into 2 files is possible, but to open splitted files give error. The same is true with other file formats. For example try the the code below with a different file extension rather than .txt or .dat (say .jpg).

is anyone who could help me please?

Best Regards,

What I have tried:

<pre>#include<iostream>
#include<fstream>
#include<stdio.h>
#include<stdlib.h>
using namespace std;
int main()
{
     ifstream fin1, fin2;
     ofstream fout;
     char ch, file_name1[20], file_name2[20], file_name3[30];
     cout<<"\n Enter First File Name with Extension '.txt'    :   ";
     gets(file_name1);
     cout<<"\n Enter Second File Name with Extension '.txt'   :   ";
     gets(file_name2);
     cout<<"\n Enter Third File Name with Extension '.txt' ";
     cout<<"\n (which will Store the Contents of \n First File and Second File)                    	:   ";
     gets(file_name3);
     
     fin1.open(file_name1);
     fin2.open(file_name2);
     if(fin1==NULL || fin2==NULL)
     {
          cout<<"\n Invalid File Name. \n There is no such File or Directory ...";
          exit(EXIT_FAILURE);
     }
     fout.open(file_name3);
     if(!fout)
     {
          cout<<"\n Invalid File Name. \n There is no such File or Directory ...";
          exit(EXIT_FAILURE);
     }
     while(fin1.eof()==0)
     {
          fin1>>ch;
          fout<<ch;
     }
     while(fin2.eof()==0)
     {
          fin2>>ch;
          fout<<ch;
     }
     cout<<"\n Two Files have been Merged into "<<file_name3<<" File Successfully...!!!";
     fin1.close();
     fin2.close();
     fout.close();
     return 0;
}

推荐答案

Quote：

我一直在寻找一种解决方案，使用C ++分割任何文件格式的文件。

I've been looking for a solution to split a file with any file format, using C++.

没有。

整个概念都是错误的。您可以获取.docx文件并将其拆分为2个文件，但生成的文件将不是有效的.docx文件。

原因很简单docx是指msword文档文件格式，它意味着该文件尊重格式，这意味着该文件有一个结构，通过拆分文件，你得到2个结构破碎的文件，这使它们不可读。

There is none.
The whole concept is wrong. You can get a .docx file and split it in 2 files, but the resulting files will not be valid .docx files.
The reason is simple docx refers to "msword document file format", it means that the file respects a format, it means that the file have a structure, by splitting the file, you get 2 files with broken structure, and it makes them unreadable.

你不能拆分文件使用格式化数据以简单的方式。如果你想这样做，你必须将所有数据加载到你的应用程序的数据模型中，并且 THAN 决定将哪些数据保存在一个或另一个文件中。



示例：压缩图像文件，首先加载它（解压缩数据），然后保存上半部分（压缩），然后保存下半部分（压缩）。

You cant split files with formatted data in a simple manner. If you want to do it, you must load all data into a data model of your app and THAN decide which data to save in one or another file.

Example: compressed image file, first load it (uncompress the data), than save the upper half (with compression) and than save the lower half (with compression).

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