Regarding Text files

[flavourofbru]

Hi,

I have a question. I know how to read text files using ifstream. Now I would like to append some data at the end of the file.

I read a text file as follows:

#include "stdafx.h"
#include<string>
#include<iostream>
#include<fstream>
using namespace std;

void main()
{
string line;
ifstream test_file;
test_file.open("test.txt", ios::in);
if(test_file.is_open())
{
while(!test_file.eof())
{
getline(test_file, line);
cout<<line<<endl;
}
}
}

Now I would like to append some more data to the end of the text file. The data are numbers(int).

How can I do that.

Please Help.

Thanks!!

[niskin]

You will need to include stdio.h to do this:

FILE *fp;
fp=fopen("example.txt", "a");
fprintf(fp, "This is text will be added to the end of the file");
fclose(fp);

[weaknessforcats]

FILE *fp;
fp=fopen("example.txt", "a");
fprintf(fp, "This is text will be added to the end of the file");
fclose(fp);

This is C.

In C++, just open your file to append:

ofstream test_file;
test_file.open("test.txt", ios::app);
 

You can also use the same stream for input and output:

fstream test_file;
test_file.open("test.txt", ios_base::out |ios_base::app);  //output
test_file.open("test.txt", ios_base::in |ios_base::beg);  //input
 

[flavourofbru]

Thnx for the help!!

It solved my problem.