Check for file existance...

Hey guys, Just need a quick little bit of help. How do you check if a file exists or not? I tried this...

Code:

---

...
if(ifstream ("filename")==0)
{
    cout<<"File Exists!";
}
...

---

it didn't work.

Thanks guys

I believe it works like this:

Code:

---

ifstream myFile("Something.txt");

if (!myFile){
cout << "\n Failed to open file.";}

else{
cout << "\n Success.";}

---

Or you can use is_open().

Code:

---

ifstream myFile("filename");
if(myFile.is_open())
{
    cout<<"File Exists!";
}

---

Or the exists() call from the CRT, which doesn't care if you actually have read permission on the file.

or if you are using windows you can use PathFileExists()

I had some problems using PathFileExists();

Code:

---

#include <iostream>
#include <windows.h>
using namespace std;
int main()
{
        if (PathFileExists("Data.txt") == 0)
        {
                cout << "File Found "<<endl;
        }
        else
        {
                cout << "File Not Found " <<endl;
        }
        cin.get();
}

---

What header file is this declared in?

Everything you ever wanted to know about PathFileExists, but were afraid to ask.

Quote:

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Originally Posted by Ken Fitlike

Everything you ever wanted to know about PathFileExists, but were afraid to ask.

---

What you meant to say was:

Everything you ever wanted to know about PathFileExists, but were too ........ing lazy to search for!

Quzah.

Code:

---

#include <iostream>
#include <windows.h>
#include <shlwapi.h>

#pragma comment(lib,"shlwapi.lib")

using namespace std;

int main()
{
        int A = PathFileExists("data.txt");

    if (A == 1)
    {
        cout << "File Found "<<endl;
    }
    else
    {
        cout << "File Not Found " <<endl;
    }
    cin.get();
        return 0;
}

---

Careful, I believe

Quote:

---

#pragma comment(lib,"shlwapi.lib")

---

is compiler specific and will not work in all cases.

*edit - oops didn't mean to bump the thread. I didn't realize it was so old. *

Thread wasn't old.

This pragma is indeed compiler-specific. But then, PathFileExists is itself platform-specific.