C++ ifstream not reading \n?

C++ ifstream not reading \n?

I'm doing a project for school, and i have to read a file, and do stuff with it. that isnt important though. i'm supposed to do the operations per line, and the way i have it right now, my ifstream object isnt detecting the '\n' character for each line, which is required for this project. here's how i have it right now:

ifstream instream;
instream >> value;
while(value != '\n')
    //do code and such

but when i have it run the loop, all i'm getting is a single line of everything in the program. while, it is doing exactly what it is supposed to in the loop, i NEED the \n to be recognized. here's my .txt document:

LXXXVII
cCxiX
MCCCLIV
CXXXLL
MMDCLXXIII
DXLCC
MCdLxxvI
XZ
X
IV

exactly like that. i cannot change it. any assistance as to what i can do would be greatly appreciated! thanks a ton!

EDIT: also, how would i be able to detect when i'm at the end of the file? thanks :D


The >> operator does a "formatted input operation" which means (among other things) it skips whitespace.

To read raw characters one by one without skipping whitespace you need to use an "unformatted input operation" such as istream::get(). Assuming value is of type char, you can read each char with instream.get(value)

When you reach EOF the read will fail, so you can read every character in a loop such as:

while (instream.get(value))
  // process value

However, to read line-by-line you could read into a std::string and use std::getline

std::string line;
while (getline(instream, line))
  // ...

This is an unformatted input operation which reads everything up to a \n into the string, then discards the \n character (so you'd need to manually append a \n after each erad line to reconstruct the original input)

C Programming Tutorial for Beginners, Learn C the Hard Way: Practical Exercises on the Computational Subjects You Keep Avoiding (Like C) "C" comes from the same letter as "G". The Semites named it gimel.The sign is possibly adapted from an Egyptian hieroglyph for a staff sling, which may have been the meaning of the name gimel.Another possibility is that it depicted a camel, the Semitic name for which was gamal.Barry B. Powell, a specialist in the history of writing, states "It is hard to imagine how gimel = "camel" can be


You can read your file as follows:

 ifstream instream("file.txt);
 string line;
 while (instream >> line)
 {
    cout << line;
    if (instream.peek() == '\n') //detect "\n"
    {
       cout <<endl;
    }
 }
 instream.close();

This way you can track where the line in file ends and detect end of file.

"C" Programming Language: Brian Kernighan, This course will give you a full introduction into all of the core concepts in the C programming Duration: 3:46:13 Posted: Aug 15, 2018 Ç or ç is a Latin script letter, used in the Albanian, Azerbaijani, Manx, Tatar, Turkish, Turkmen, Kurdish, Zazaki, and Romance alphabets. Romance languages that use this letter include Catalan, French, Friulian, Ligurian, Occitan, and Portuguese as a variant of the letter C. It is also occasionally used in Crimean Tatar and in Tajik to represent the /d͡ʒ/ sound. It is often retained in the spelling of loanwords from any of these languages in English, Basque, Dutch, Spanish and other


I guess you are looking for this: instream.unsetf(std::ios_base::skipws)

How easy is it to learn C?, "C" is one of the most widely used programming languages of all time. Prof Brian Kernighan Duration: 8:26 Posted: Aug 18, 2015 Stock analysis for Citigroup Inc (C:New York) including stock price, stock chart, company news, key statistics, fundamentals and company profile.


How is C programming language still used today?, - and extremely flexible. So flexible, in fact, that as you use the language, you probably go through many different programming styles as you work out how to use the language to produce good, maintainable, reliable code. C-- (pronounced cee minus minus) is a C -like programming language. Its creators, functional programming researchers Simon Peyton Jones and Norman Ramsey, designed it to be generated mainly by compilers for very high-level languages rather than written by human programmers.


Which programs are written in C language?, is best choice when you start programming as it is most basic. This is a list of operators in the C and C++ programming languages.All the operators listed exist in C++; the fourth column "Included in C", states whether an operator is also present in C. Note that C does not support operator overloading.. When not overloaded, for the operators &&, ||, and , (the comma operator), there is a sequence point after the evaluation of the first operand.


Learn C, . Some of the examples are operating systems, more specifically OS kernels, device drivers and interfaces, etc. As well as C and Simula's influences, other languages also influenced this new language, including ALGOL 68, Ada, CLU and ML . Initially, Stroustrup's "C with Classes" added features to the C compiler, Cpre, including classes, derived classes, strong typing, inlining and default arguments.