WRITE()

This is used to write binary or raw data to a file, as opposed to formatted output done using the << operator. The write() function takes two arguments: a pointer to a character array (usually cast as const char*) and a size value of type streamsize that indicates how many bytes to write. Its typical use case is for writing data structures, binary files, or blocks of memory directly to a file. For example, file.write(reinterpret_cast<const char*>(&data), sizeof(data)); writes the raw bytes of the data object to the file. Because it doesn't interpret the data as text, write() is suitable for non-text file operations where exact byte representation matters. It's important to ensure the file is open and ready for output before calling write(), and to handle any errors appropriately using file state checks like .fail() or .good().

std::ostream& write(const char* s, std::streamsize n);

 * s: Pointer to the block of memory (typically a char array) to write.
 * n: Number of bytes to write from the memory block.

// Writing to a file using ofstream
#include <iostream>     // For standard I/O operations
#include <fstream>      // For file stream classes

using namespace std;

int main()
{
    // Create an ofstream (output file stream) object and open the file
    // Note: Use double backslashes in Windows file paths to escape them properly
    ofstream write("C:\\Users\\Creator\\fileName.txt");

    // Check if the file was successfully opened
    if (!write) {
        cerr << "Failed to open the file." << endl;
        return 1; // Exit with an error code
    }

    // Write a line of text to the file
    write << "Lorem ipsum dolor sit amet,...";

    // Close the file to ensure data is saved and resources are released
    write.close();

    // Return 0 to indicate successful execution
    return 0;
}