As we close this tutorial on file handling and I/O operations in C++, it's time to connect the dots with an example that combines all the lessons learned so far. Let's consider the scenario where we are dealing with the financial data of different market indices. We are assuming that the data is coming from a live feed and we have to write this information into a file for later analysis.
In the provided C++ code, we make use of the ofstream object to open a file named 'financial_data.txt' for writing. We then proceed to write some financial data onto the file and close it. Following this, we use the ifstream object to open our 'financial_data.txt' for reading. We print each line until the end of the file.
This example represents a simple use-case wherein an application is constantly writing data to a file. Analysts can then read the generated files for processing the data without having to connect to the live feed directly. This type of file logging is common in application backends, allowing developers and system administrators to diagnose or monitor the system's functions.
We hope that this C++ tutorial has provided you with a solid understanding of the file input/output operations and you'll be able to apply these concepts effectively in your real-world applications.
xxxxxxxxxx}using namespace std;int main() { // Open a new file ofstream dataFile("financial_data.txt"); // Check if the file is opened if (dataFile.is_open()) { // Write some financial data to the file dataFile << "NASDAQ: 13804.73\n"; dataFile << "DOWJONES: 34058.75\n"; dataFile << "S&P500: 4395.64"; dataFile.close(); } else { cout << "File could not be opened.\n"; } // Open the file for reading string line; ifstream readFile("financial_data.txt"); // Print each line of the file while (getline (readFile, line)) { cout << line << '\n'; } readFile.close();