c++ read_ascii

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

int main() {
    std::ifstream file("input.txt");
    if (!file.is_open()) {
        std::cout << "Failed to open the file." << std::endl;
        return 1;

    std::string line;
    while (std::getline(file, line)) {
        std::cout << line << std::endl;

    return 0;


  1. #include <iostream>: Includes the input/output stream library for handling input/output operations.

  2. #include <fstream>: Includes the file stream library to perform input/output operations on files.

  3. #include <string>: Includes the string library for handling strings.

  4. int main() { ... }: The main function, the entry point of the program.

  5. std::ifstream file("input.txt");: Declares an input file stream object named file and opens a file named "input.txt" for reading.

  6. if (!file.is_open()) { ... }: Checks if the file opening was unsuccessful. If the file failed to open, it displays a message indicating failure and returns 1 to indicate an error.

  7. std::string line;: Declares a string variable named line to store each line of the file.

  8. while (std::getline(file, line)) { ... }: Reads each line from the file using std::getline() and stores it in the line variable. The loop continues until there are no more lines to read.

  9. std::cout << line << std::endl;: Prints each line read from the file to the standard output (console).

  10. file.close();: Closes the file stream once reading is complete.

  11. return 0;: Indicates successful execution of the program by returning 0 to the operating system.