CODEWITHSUNDEEP
c++file-iofstreamc-strings
highlander141
highlander141

Reputation: 1725

File I/O operations - strange character entry?

I am using the str.erase() function in the following program to erase certain part of output. But at the last I am getting a strange output like this ����.

The content of my file is Current name of the file = ABCD-1234

Here is my code:

#include <iostream>
#include <fstream>
#include <string>
#include <stdio.h>
#include <stdlib.h>

using namespace std;
//std::ifstream;

int main ()
{
  string line;
  ifstream myfile ("/home/highlander141/NetBeansProjects/erase_remove/dist/Debug/GNU-Linux-x86/abc.txt");
  if (myfile.is_open())
  {
    while ( !myfile.eof() ) //myfile.good()
    {
      getline (myfile,line);
        //line = myfile.get();
        //if(!myfile.eof())
      cout << line <<endl;
      std::string str (line); 
      str.erase (str.begin()+0, str.end()-9);
      std::cout << str << endl;

    }
      myfile.close();
      //remove("/home/highlander141/NetBeansProjects/erase_remove/dist/Debug/GNU-Linux-x86/abc.txt");
  }

  else cout << "Unable to open file"; 

return 0;
}

And output of my program is

Current name of the file = ABCD-1234
ABCD-1234

����

RUN FINISHED; exit value 0; real time: 10ms; user: 0ms; system: 0ms

Upvotes: 1

Views: 126

Answers (1)

unxnut
unxnut

Reputation: 8839

You are checking for eof() before reading the input. Modify the loop as follows:

while ( 1 )
{
    getline (myfile,line);
    if ( myfile.eof() )
        break;

    // Rest of the loop
}

Upvotes: 2

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