Visual C++ :: Check For File Existence - Function Will Fail Or Return Non-zero Value
Sep 21, 2013
Just wonder is it possible that if the file exist, this function below will fail by returning non-zero value?
_access( INIFilename, 00 )
00 - check for Existence only
I noticed that sometimes if even the file exist, the function will fail or return non-zero value. So trying to find out and duplicate this error. It tends to happen intermittently. How can I find out what causing this error?
Code:
char INIFilename[256]="C: emp est.ini";
unsigned long Error = 0;
if( _access( INIFilename, 00 ) != 0 ) {
Error= GetLastError();
printf ("Failed to access INI file %s (%ul)", INIFilename, Error);
}
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Mar 24, 2013
I have this code to check if file exist already and its work, but what i need is : is to add feature to function to see if the file already exist open same file and rename it with another name ,probably file2
assume file name is "abc.c"
This scenario like this
User>>(provide file name)
Code>>(check if file already exist show msg:
"File already (abc.c) exist would you like to create another file and rename it ("abc2.c") "maybe it need loop to search directory "????
User>>if press yes ok it will make another file with another name but if no exit the function and dont create another file
Code: // function to check file existence and here what i need to add the feature above
int fExist(const char* fn){
struct stat buffer;
int exist = stat(fn,&buffer);
if(exist == 0)
[Code] .....
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Oct 3, 2014
I dont know how return message when user fail to open Database.
I building this class to manage db
The "open" method return an OleDbConnection type to manage it later
On catch zone I cant return string , int or other types
class ApriDB {
//Stato interno
string connessione = "";
// metodi
public ApriDB() { } // Costruttore di default
public OleDbConnection open (string connessione) {
OleDbConnection conn = new OleDbConnection(connessione);
[code].....
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Dec 5, 2014
When I write the Ctor as follows, I get an Error: Invalid Sharing Flag 0 (That happens when file exists or does not exist)
File::File(const string& file)
{
m_file.open(file, std::ios::out, std::ios::app);
}
When I write the Ctor as foolows, I manage to open / create a file.
File::File(const string& file)
{
m_file.open(file);
}
What is wrong with option #1?
note that m_file is a data member of type ofstream
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Nov 5, 2014
I am using stat command to check the existence of a file in a directory.
The directory is having some 10K files. I feel the stat() call is expensive as i do not need the structure to be populated.
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Is there any other alternative faster way to do this in C.
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Feb 24, 2015
How to check the type of argument passed to each function, checktype, in below?.
void checktype(void *p)
{
}
or
template <typename Type>
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Nov 27, 2013
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Code:
#include <stdio.h>
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[code]....
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Sep 30, 2013
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Feb 24, 2012
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Mar 29, 2013
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Code:
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struct tnode
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[code]....
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Feb 12, 2014
I'm trying to pass 2 arrays into a void funtion, and return values to one function.
this is the the program I'm working with, after I'm done I have to split it into 3 files, a header, a main, and a separate cpp file for the functions to live in.
#include <iostream>
using namespace std;
void processArrary(int numberCount[], int Numbers[], int intnumberSize, int numberCountSize);
int main() {
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[code]...
The goal of this program is to separate and count the groups of numbers then output the amount of numbers in each group. Near as I can tell, everthing should work, but I'm getting all zeros to be displayed in each group.
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Feb 12, 2013
I use MFC Find console window and send key to console like this.
Code:
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[Code]....
After program process success in console it not close console windows but it show like this in Output
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Jun 9, 2013
The function is supposed to return value from the file in my main, but I am getting empty value. I am trying to get better with pointer. Right now just teaching myself.
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Code:
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Jun 20, 2014
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Any effective way to check if x in the following programme has been entered correctly
#include <iostream>
using namespace std;
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HERE I WOULD LIKE CODE TO CHECK IF THE USERS INPUT IS VALID
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Jul 25, 2013
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Jan 20, 2014
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Code :
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*/
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[Code] ....
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Nov 10, 2014
Under visual studio, this is a typical run time error,
Code:
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int x;
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Code:
void func(int& x) {
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Dec 2, 2014
I get this error:
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when i try to run my code. It has compiled fine on another computer, but it simply will not work on this one. This is the part of code where it is receiving the error. it has to do with the stoi
Code:
#include <string> // for use of string
#include <fstream> //for file handling
#include <iostream> // for file handling
#include <cstdlib>
#include <iomanip> //for the setprecision used further below
using namespace std;
struct MasterData //struct created named 'MasterData' to hold one line from master file
[Code] .....
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Nov 27, 2013
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Feb 15, 2013
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Code:
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[Code] ....
I have removed the error from the main code but there's still this lingering error in the return part.
syntax error before 'return'.
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Jun 7, 2013
PHP Code:
int processString(xxx)
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To make the function work better we change its internals
PHP Code:
int processString(xxx)
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//do something
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This phenomenon can be observed by use of mutibyte to wide char conversions, string copy , concatenation functions of MS etc ....
Should I minus one in the return value of the second function to match both versions ?
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Nov 28, 2013
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Code:
STDMETHODIMP CSimpleChat::CellMe(BSTR name, BSTR** helloMessage) {
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Jan 14, 2015
Why my function will not return this int. It does make it into the if(... prints "test 32" but will not return the given value(123456789).
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