How do you open and read files in C++ (NOT WRITING OR CREATING NEW ONES)

I need help. I am trying to experiment with reading from a file (to create an esolang or such). I have successfully created and closed files, but not read from them or an already existing file.


I have tried multiple ways to no avail.

lol I just use freopen("file.txt", "r", stdin); and proceed with cin

Explain and help pls ive never done this before :sob:

same lol I only use freopen XD


Here’s some info that should help. Check out the read a file example. :smile:


To open and read files in C++, you can use the “fstream” library which provides classes for working with files. Here’s an example code snippet that demonstrates how to open and read a file in C++:

// You can modify the directory paths to your own needs
#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main() {
   // Open a file for reading
   ifstream inputFile("example.txt");

   // Check if the file was opened successfully
   if (!inputFile) {
      cerr << "Error opening file" << endl;
      return 1;

   // Read the file line by line
   string line;
   while (getline(inputFile, line)) {
      cout << line << endl;

   // Close the file

   return 0;
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