使用C ++从文本文件读取数据到文件的开头到文件的结尾 [英] Reading Data From Text File From the begging of the file to the end of the file Using C++

问题描述

嗨 我有一个具有480数据线的文本文件，当我开始读取数据时，我使用索引来计数已读取的行数，并且我发现索引开始从180到480计数(如您在代码中看到的那样)，可以为您提供帮助我使它从第1行返回数据到行，并且我逐行从中获取数据，您应该知道它们之间有空行，我不需要它们..

Hi I have an text file having 480 Data Line and when i begins to read the data i use an index to count the number of lines were read and i found that the index begin count from 180 to 480 as you see in the code can you help me in making it return the data from line 1 to line and i take the data from it line by line and you should know there is empty line in between and i did not need them thanks..

ifstream rfile;
 rfile.open("1.txt");
 char Out[256];
 char check;
 int index=0;
 rfile.seekg(0,ios::cur);
   while(!rfile.eof())
   {
      index++;
      rfile>>Out;
      
      index;
      for(int i =0;i<7;i++)
      cout<<Out[i];
      cout<<"   --->   ";
      if(Out[0]=='N' && Out[1]=='N' && Out[2]!='N' && Out[3]!='N' &&  Out[4]!='N' && Out[5]!='N' && Out[6]!='N')
        cout<<"  Valid"<<endl;
      else if (Out[0]!='N' && Out[1]!='N' && Out[2]=='N' && Out[3]=='N' && Out[4]!='N' && Out[5]!='N' && Out[6]!='N')
        cout<<"  Valid"<<endl;
      else if (Out[0]!='N' && Out[1]!='N' && Out[2]!='N' && Out[3]!='N' && Out[4]=='N' && Out[5]=='N' && Out[6]=='N')
        cout<<"  Valid"<<endl;
      else
       cout<<"UNValid"<<endl;

   }
 rfile.close();

推荐答案

尝试类似的方法来读取文件(不要像您一样使用char这样做，您就不必担心缓冲区溢出等).

Try something like this to read the file (don''t use chars like you''re doing and you won''t have to worry about buffer overflows and such).

#include <string>
#include <iostream>
#include <fstream>
 
void main()
{
   using namespace std;
 
   ifstream ifs("1.txt");
   if (!ifs)
   {
       cerr << "Error opening file!" << endl;
       return;
   }
 
   string line;
   while (getline(ifs, line))
   {
       cout << line << endl;
   }
}

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