读取文件内容时出现问题

发布于 2024-11-06 07:58:09 字数 406 浏览 1 评论 0原文

我有一个包含文本的文件。我逐行读取整个文件并附加到字符串对象。但是当我打印出最终的字符串时，我没有得到整个文件内容。我确信这是由于存在特殊字符，如 '\n'、'\r'、'\t' 等。

这是我的示例代码：

// Read lines until end of file (null) is reached
do
{
    line = ""; 
    inputStream->read_line(line);

    cout<<"\n "<<line;//here i get the content of each line
    fileContent.append(line);// here i am appending
}while(line.compare("") != 0);

原文

I have a file which contains text. I read line by line of the entire file and append to a string object. But when i get the final string print out i am not getting the whole file content. I am sure it is due to the presence of special characters like '\n', '\r', '\t', etc.

here is my sample code:

// Read lines until end of file (null) is reached
do
{
    line = ""; 
    inputStream->read_line(line);

    cout<<"\n "<<line;//here i get the content of each line
    fileContent.append(line);// here i am appending
}while(line.compare("") != 0);

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雨后咖啡店 2024-11-13 07:58:09

这是 C++ 中将文件读入内存的方法：

#include <string>
#include <vector>
#include <iostream>
#include <fstream>
using namespace std;

int main() {
    vector <string> lines;
    ifstream ifs( "myfile.txt" );
    string line;
    while( getline( ifs, line ) ) {
         lines.push_back( line );
    }
    // do something with lines
}

This is the way to read a file into memory in C++:

#include <string>
#include <vector>
#include <iostream>
#include <fstream>
using namespace std;

int main() {
    vector <string> lines;
    ifstream ifs( "myfile.txt" );
    string line;
    while( getline( ifs, line ) ) {
         lines.push_back( line );
    }
    // do something with lines
}

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戴着白色围巾的女孩 2024-11-13 07:58:09

您必须向我展示更多代码才能知道您的问题是什么。

如果您将整个文件读入单个字符串，这是我通常使用的方法：

#include <string>
#include <fstream>
#include <iterator>

std::string read_file(const char *file_name)
{
    std::filebuf fb;

    if(!fb.open(file_name, std::ios_base::in))
    {
        // error.
    }

    return std::string(
        std::istreambuf_iterator<char>(&fb),
        std::istreambuf_iterator<char>());
}

You’ll have to show more code for me to know what your problem is.

If you’re reading the entire file into a single string, this is the method I usually use:

#include <string>
#include <fstream>
#include <iterator>

std::string read_file(const char *file_name)
{
    std::filebuf fb;

    if(!fb.open(file_name, std::ios_base::in))
    {
        // error.
    }

    return std::string(
        std::istreambuf_iterator<char>(&fb),
        std::istreambuf_iterator<char>());
}

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~没有更多了~