c++ file exists

Sure! Here is a response:

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

int main() {
    std::string line;
    std::ifstream file("example.txt");

    if (file.is_open()) {
        while (getline(file, line)) {
            std::cout << line << std::endl;
        }
        file.close();
    }
    else {
        std::cout << "Unable to open file";
    }

    return 0;
}

Explanation:

• Step 1: Include the necessary header files for input/output stream, file stream, and string.
• Step 2: Define the main function as the entry point of the program.
• Step 3: Declare a string variable line to store each line of the file.
• Step 4: Create an input file stream object file and open the file "example.txt".
• Step 5: Check if the file is open using the is_open method of the file stream object.
• Step 6: If the file is open, enter a loop to read each line of the file using the getline function and store it in the line variable.
• Step 7: Output the line to the console using std::cout.
• Step 8: Close the file using the close method of the file stream object.
• Step 9: If the file cannot be opened, output a message to the console.

I hope this helps!