A really weird thing happening

[Fumozzo]

I use Visual C++ and I have this code as a member function of a class I created:

ifstream DatFile("C:\\analize.dat");
DatFile.get(m_AppPath,100);
DatFile.close(); 

In the analize.dat file there is a path to an application and m_AppPath is an array of 100 char.

The problem is that the program works well when I compile it in the Debug mode, but give me a system error when I run the version compiled in release mode.

The program compiled in the release mode works well if I assign directly a value to m_AppPath, for example:

ifstream DatFile("C:\\analize.dat");
DatFile.get(m_AppPath,100);
DatFile.close();
m_AppPath="C:\\dir\\app.exe"; 

Does someone know why the first code work only in debug mode ?
Thanx

[parksie]

Make m_AppPath an array of 101, then after the .get(m_AppPath, 100) you need to put the null terminator on (if there isn't one already):

m_AppPath[100] = '\0';

Actually, why can't you just use a string for the path?

#include <string>

// in class def
std::string m_AppPath;

// your code
ifstream DatFile("C:\\analize.dat");
getline(DatFile, m_AppPath);
DatFile.close();

For this you'll need to be using the standard iostreams (in <iostream> and <fstream>, not <iostream.h> and <fstream.h>).

[Fumozzo]

Ok, thanx
However, why does my code work only in debug mode ?

[CornedBee]

Because in debug mode, there is automatically a little more space allocated, so that such errors don't simply occur but rather can be traced. You're writing in a forbidden area, the app would eventually warn you about this.