C++ (Cpp) file::close Examples

Programming Language: C++ (Cpp)

Class/Type: file

Method/Function: close

Examples at hotexamples.com: 3

The C++ File close function is a pre-defined function that is used to close a file that has been opened for reading or writing. This function flushes any pending buffers and disassociates the file with the stream, freeing up the resources. It is important to close a file after all operations have been completed, as leaving the file open can cause memory leaks and other errors.

Examples:

// Example 1: Closing a file after reading from it
#include 
#include 

int main() {
  std::ifstream file("example.txt");
  if (file.is_open()) {
    std::string line;
    while (getline(file, line)) {
      std::cout << line << std::endl;
    }
    file.close(); // Close the file after all lines have been read
  } else {
    std::cout << "Error opening file" << std::endl;
  }
  return 0;
}

// Example 2: Closing a file after writing to it
#include 
#include 

int main() {
  std::ofstream file("example.txt");
  if (file.is_open()) {
    file << "Hello, world!" << std::endl;
    file.close(); // Close the file after writing is complete
  } else {
    std::cout << "Error opening file" << std::endl;
  }
  return 0;
}

Package library: The C++ File close function is part of the standard C++ library and is included in the `` header file.

C++ (Cpp) file::close - 3 examples found. These are the top rated real world C++ (Cpp) examples of file::close from package poedit extracted from open source projects. You can rate examples to help us improve the quality of examples.

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Example #1

Show file

File: binary-file-read-and-transmit.c Project: cancapture/CANCapture-Resources

//This function is called when a capture is stopped
//"block" holds an object representing the current script block on the flowchart
void OnStopCapture(ScriptBlock block)
{
    if (bFileOpen == true) {
        handle.close();
    }
 
    //block.ClearOutputText(); //Clear this scripts output window
    block.PrintOutputText("Binary file write stopped\n", false, false, false, false); //Print to the output window
}

Example #2

Show file

File: posix.cpp Project: BombShen/kbengine

void file::pipe(file &read_end, file &write_end) {
  // Close the descriptors first to make sure that assignments don't throw
  // and there are no leaks.
  read_end.close();
  write_end.close();
  int fds[2] = {};
#ifdef _WIN32
  // Make the default pipe capacity same as on Linux 2.6.11+.
  enum { DEFAULT_CAPACITY = 65536 };
  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
#else
  // Don't retry as the pipe function doesn't return EINTR.
  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
  int result = FMT_POSIX_CALL(pipe(fds));
#endif
  if (result != 0)
    FMT_THROW(system_error(errno, "cannot create pipe"));
  // The following assignments don't throw because read_fd and write_fd
  // are closed.
  read_end = file(fds[0]);
  write_end = file(fds[1]);
}

Example #3

Show file

File: binary-file-read-and-transmit.c Project: cancapture/CANCapture-Resources

//This function is called everytime a message is received on an input port
//"inPort" will hold the port the message was received by (1, 2, or 3)
//"block" holds an object representing the current script block on the flowchart
//"msg" holds an object representing the message received
//type "block." or "msg." to see a list of available parameters and functions
void OnReceiveMessage(uint8 inPort, ScriptBlock block, Message &msg)
{
    if (!bFileOpen) {
        return;
    }
 
    //Here we pretend that we get some sort of ACK or response from the embedded device that indicates that
    //it is ready to receive the next packet of data containing the firmware image.  Most reprogramming/flash
    //protocols has some sort of similar indicator meaing something to the effect of "read for data".
    //For testing, you can simply use a 29-bit transmitter that sends a packet with ID=1234 at a repeating
    //interval
    if (msg.GetID() == 1234) {
 
        //Prep our data payload packet that will be sent to the embedded device
        Message dataMsg;
        dataMsg.SetID(12345);       
        dataMsg.Set11Bit(0);          //I am assuming its 29-bit CAN messages       
 
        block.PrintOutputText("Sending CAN packet ID=" + dataMsg.GetID() + " with data:", false, false, true, false);
        //Read up to 8 bytes of data from the firmware image to fill the next packet of CAN data   
        int i = 0;
        for (i = 0; i < 8; ++i) {
            if (handle.isEOF()) {   //Check for end of file
                block.PrintOutputText("\nEnd of file reached", false, false, false, true);  //print a message indicating the data
                handle.close();        //Close file and release flag that indicates its open
                bFileOpen = false;
                break;
            }
            uint8 dataByte = handle.readUInt8();  //read a single byte of data from the file
            block.PrintOutputText(" " + dataByte, false, false, true, false);  //print a message indicating the data
            dataMsg.SetData(i, dataByte);  //and store the byte from the file directly into our CAN packet structure       
        }
        block.PrintOutputText("\n", false, false, true, false);
 
        dataMsg.SetDataLength(i);  //set the length to the number of bytes read from the file
 
        //And finally send the data packet
        block.SendMessage(1, dataMsg);               
    }
}