LinuxQuestions.org - c++ check if file exists

A file? Like... to check if a file exists when you try to open or write to it? If so, try something like this:

Code:

#include<fstream>

#include<iostream>

using namespace std;



int main()

{

    char fileName[80];

    char buffer[255];

    cout << "Give file name: ";

    cin >> fileName;



    ifstream fin(fileName);

    if (fin)  // check to see if file exists

    {

        cout << "This file has:\n";

        char ch;

        while (fin.get(ch))

            cout << ch;

        cout << "\n End of file \n";

    }

    fin.close();



    cout << "Opening file" << fileName << " in append mode...\n";



    ofstream fout (fileName,ios::app);

    if (!fout)  // if you try to open the file for writing and it fails, then

    {

        cout << " Impossible to open " << fileName << "for writing...\n";

        return(1);

    }



    cout << "\n Enter text to the file: ";

    cin.ignore(1,'\n');

    cin.getline(buffer,255);

    fout << buffer << "\n";

    fout.close();



    // try to re-open the file read-only

    fin.open(fileName);

    if(!fin)    // if fails, then:

    {

        cout << "Error opening file " << fileName << " for reading...\n";

        return(1);

    }



    cout << "Now the file contains:\n";

    char ch;

    while (fin.get(ch))

        cout << ch;

    cout << "\n End of the file reached, closing program...\n";

    fin.close();



    return 0;

}

Note: I've no idea if it will compile... I've not tested it myself, I just wrote it now :). But you will get the idea...

Regards!