FileExists function

[Bargaust]

Can anyone tell me how I can find out whether a file exists on a given path? Something like this:

bool FileExists(char* FilePath) {
...
}

 

[BungoMan]

//i think a string would work just a well right?
//if it doesnt then just use an array of chars

#include <fstream.h>
#include <iostream.h>
#include <string>

bool fileexists(string filename);

void main()
{
string filename;
getline(cin,filename);
if (fileexists(filename))
cout << filename << &quot;exists.&quot; << endl;
else
cout << filename << &quot;does not exist.&quot; << endl;
}

bool fileexists(string filename)
{
ifstream infile;
infile.open(filename);
if (infile)
{
infile.close();
return true;
}
else
{
infile.close();
return false;
}
}

it *should* work, never done this exact thing before, but done stuff that checks to see if the file is there before it does anything, so i bet itd work

 

[tchouch]

It will not work, infile != NULL allways.
There are a lot of ways to do it.
1)
#include <windows.h>
if(GetFileAttributes( PathName) == -1 ) {
//File not exists or no access - what is?
unsigned long dwerr = GetLastError();
if(dwerr == ERROR_SUCCESS || dwerr == ERROR_FILE_NOT_FOUND || dwerr == ERROR_PATH_NOT_FOUND || dwerr == ERROR_BAD_NETPATH) {
//File really not exists!
}
else {
//No access
}
}
2)
#include <io.h>
...
if(access(PathName, 0) == -1) {
//File not exists
}
3)
#include <stdio.h>
....
FILE * fl = fopen(PathName,&quot;rb&quot;
if ( fl == NULL) {
//File not exists or no read access
}
else
fclose( fl); //Close handle