File Handling: Read/Write to File Gaming Project in C++

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3 months ago

#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

// Function to read integers from a file
vector<int> readIntegersFromFile(const string& filename) {
    ifstream file(filename);
    if (!file) {
        cerr << "Error opening file for reading: " << filename << endl;
        exit(1);
    }

    vector<int> numbers;
    int number;
    while (file >> number) {
        numbers.push_back(number);
    }

    file.close();
    return numbers;
}

// Function to write the sum to a file
void writeSumToFile(const string& filename, int sum) {
    ofstream file(filename);
    if (!file) {
        cerr << "Error opening file for writing: " << filename << endl;
        exit(1);
    }

    file << "Sum of integers: " << sum << endl;
    file.close();
}

int main() {
    string inputFilename, outputFilename;

    cout << "Enter the input file name: ";
    cin >> inputFilename;
    cout << "Enter the output file name: ";
    cin >> outputFilename;

    // Read integers from the input file
    vector<int> numbers = readIntegersFromFile(inputFilename);

    // Calculate the sum of integers
    int sum = 0;
    for (int number : numbers) {
        sum += number;
    }

    // Write the sum to the output file
    writeSumToFile(outputFilename, sum);

    cout << "Sum calculation complete. Check the output file: " << outputFilename << endl;

    return 0;
}

#include <iostream>

#include <fstream>

#include <vector>

using namespace std;

// Function to read integers from a file

vector<int> readIntegersFromFile(const string& filename) {

ifstream file(filename);

if (!file) {

cerr << "Error opening file for reading: " << filename << endl;

exit(1);

}

vector<int> numbers;

int number;

while (file >> number) {

numbers.push_back(number);

}

file.close();

return numbers;

}

// Function to write the sum to a file

void writeSumToFile(const string& filename, int sum) {

ofstream file(filename);

if (!file) {

cerr << "Error opening file for writing: " << filename << endl;

exit(1);

}

file << "Sum of integers: " << sum << endl;

file.close();

}

int main() {

string inputFilename, outputFilename;

cout << "Enter the input file name: ";

cin >> inputFilename;

cout << "Enter the output file name: ";

cin >> outputFilename;

// Read integers from the input file

vector<int> numbers = readIntegersFromFile(inputFilename);

// Calculate the sum of integers

int sum = 0;

for (int number : numbers) {

sum += number;

}

// Write the sum to the output file

writeSumToFile(outputFilename, sum);

cout << "Sum calculation complete. Check the output file: " << outputFilename << endl;

return 0;

}

Explanation:

Reading from a File (readIntegersFromFile):
- Opens a file for reading using an ifstream.
- Checks if the file was successfully opened.
- Reads integers from the file and stores them in a vector<int>.
- Closes the file and returns the vector of integers.
Writing to a File (writeSumToFile

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):
- Opens a file for writing using an ofstream.
- Checks if the file was successfully opened.
- Writes the sum of integers to the file.
- Closes the file.
Main Function (main):
- Prompts the user for the input and output filenames.
- Calls readIntegersFromFile to read integers from the input file.
- Calculates the sum of the integers.
- Calls writeSumToFile to write the sum to the output file.
- Prints a message indicating completion and the location of the output file.

Possible Enhancements:

Error Handling: Add more robust error handling to manage different file-related issues.

Data Validation: Implement checks to validate the data read from the file (e.g., ensure it contains only integers).
Flexible Data Processing: Extend the program to handle different types of data and perform more complex processing.
Command-Line Arguments: Modify the program to accept filenames as command-line arguments for more flexible usage.

Explanation:

Possible Enhancements:

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