Installation and Configuration
Programming Methodology

Copy File Contents Using C++

This exercise involves writing a C++ program to copy the entire content of one file into another. By completing this task, you will practice using file streams in C++, specifically `ifstream` for reading and `ofstream` for writing. You'll learn how to handle file input/output operations, which are crucial for many real-world applications involving data processing or backup systems. The program will read the source file line by line and write each line into the destination file, effectively duplicating the content.

Group

File Management in C++

Objective

1. Ask the user to enter the names of the source and destination files.
2. Open the source file using `ifstream` for reading.
3. Open the destination file using `ofstream` for writing.
4. Read each line from the source file and write it into the destination file.
5. Close both files and confirm that the content has been copied successfully.

Develop a program that copies the contents of one file to another.

Example C++ Exercise

 Copy C++ Code 
#include <iostream>       // Include for input and output stream
#include <fstream>        // Include for file handling
#include <string>         // Include for using the string class

using namespace std;

int main() {
    string sourceFile, destinationFile;   // Variables to store filenames

    // Ask user for source and destination file names
    cout << "Enter the source file name: ";
    cin >> sourceFile;
    cout << "Enter the destination file name: ";
    cin >> destinationFile;

    ifstream inFile(sourceFile);          // Open the source file for reading
    ofstream outFile(destinationFile);    // Open the destination file for writing

    // Check if the source file opened successfully
    if (!inFile) {
        cout << "Error: Could not open the source file." << endl;
        return 1;   // Exit with error code
    }

    // Check if the destination file opened successfully
    if (!outFile) {
        cout << "Error: Could not open/create the destination file." << endl;
        return 1;   // Exit with error code
    }

    string line;    // Variable to hold each line read from the source file

    // Read and copy lines from source to destination
    while (getline(inFile, line)) {
        outFile << line << endl;    // Write the line to the destination file
    }

    // Close both files
    inFile.close();
    outFile.close();

    // Confirm successful copy
    cout << "File copied successfully from " << sourceFile << " to " << destinationFile << "." << endl;

    return 0;   // End of program
}

 Output

Enter the source file name: original.txt
Enter the destination file name: copy.txt
File copied successfully from original.txt to copy.txt.

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