Reading a text file / carriage return

[stephane]

Hi,

I don't know how to test something.

I read at file.txt caracter by caracter

And I would like to know when it is the end of my line in the text file.
exemple of a line:

stephane;vollet;1234;

what could I put into the bracket to test the end of the line?

while(!=' carriage return ')
{

I don't if that clear enough...

thanks for your time anyway.

stephane

 

[Rolf Magnus]

Hi,

I don't know how to test something.

I read at file.txt caracter by caracter

And I would like to know when it is the end of my line in the text file.
exemple of a line:

stephane;vollet;1234;

what could I put into the bracket to test the end of the line?

while(!=' carriage return ')
{

char c;
//...
while (c != '\n')
{
//....
}

Btw: is there a reason why you don't read in the whole line at once?

 

[stephane]

Yeah I don't read the whole line because I need to get the name and surname
separated by " ; " and put them in a binary file in a struct...

You see?

 

[Rolf Magnus]

Yeah I don't read the whole line because I need to get the name and
surname separated by " ; " and put them in a binary file in a struct...

You see?

Then try something like that:

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>

int main()
{
std::ifstream file("file.txt");
std::string line;
while (std::getline(file, line))
{
std::string name, surname, rest;
std::istringstream stream(line);

std::getline(stream, name, ';');
std::getline(stream, surname, ';');
std::getline(stream, rest);

if (!stream)
std::cout << "Corrupt line found\n";
else
std::cout << "Name: " << name
<< ", Surname: " << surname
<< ", rest of the line: " << rest << '\n';
}
}

 

[Matt Wharton]

what could I put into the bracket to test the end of the line?

while(!=' carriage return ')
{

Depends on how your platform represents end of line (usually either '\n' or
"\r\n").

Something like:

while ( ch != '\n' )

is probably the kind of thing you're looking for.

HTH,

-Matt

 

[Rolf Magnus]

Depends on how your platform represents end of line (usually either '\n'
or "\r\n").

Not if the file was opened in text mode. Then, the line ending is always
automatically converted from the platform's native format to '\n'.