Practice Problems on File Handling in C++

#include <iostream>Copy Code
int main() {
// Open a file for writing
std::ofstream outputFile("example.txt");

// Check if the file is successfully opened
if (!outputFile.is_open()) {
std::cerr << "Error opening the file!" << std::endl;
return 1;
}

// Write a sentence to the file
outputFile << "Hello, this is a sentence written to a file in C++." << std::endl;

// Close the file
outputFile.close();

std::cout << "Sentence successfully written to the file." << std::endl;

return 0;
}

#include <iostream>Copy Code
#include <iostream>
int main() {
// Open a file for reading
std::ifstream inputFile("example.txt");

// Check if the file is successfully opened
if (!inputFile.is_open()) {
std::cerr << "Error opening the file!" << std::endl;
return 1;
}

// Read the first line from the file
std::string firstLine;
std::getline(inputFile, firstLine);

// Close the file
inputFile.close();

// Display the first line
std::cout << "First line from the file: " << firstLine << std::endl;

return 0;
}