How do I get the double slash form of the path where the currently running. EXE is located? ---using GetModuleFileName

Let's take a look at a simple program:

#include <windows.h>
#include <iostream>
using namespace std;

int main ()
{
	char  szbuf[1025] = {0};   
	GetModuleFileName (NULL, szbuf, sizeof (SZBUF));
	cout << szbuf << Endl; C:\Documents and settings\administrator\ Desktop \cpp\test\debug\test.exe return

	0;
}

However, if you use the above road strength in the program, it is not, because \ in C language is the escape character, we look at the following:

#include <fstream>
using namespace std;

int main ()
{
	ofstream outfile ("C:\Documents and settings\administrator\ Desktop \mycpp\test.txt"); Test.txt files will not be generated
	outfile << "Hello World" << Endl;

	return 0;
}

And the following procedure is OK:

#include <fstream>
using namespace std;

int main ()
{
	ofstream outfile ("C:\\Documents and settings\\administrator\\ Desktop \\MYCPP\test.txt"); Will generate Test.txt file
	outfile << "Hello World" << Endl;

	return 0;
}

We continue to look at:

#include <windows.h>
#include <iostream>
using namespace std;

int main ()
{
	char  szbuf[1025] = {0};   
	GetModuleFileName (NULL, szbuf, sizeof (SZBUF));
	cout << szbuf << Endl;   C:\Documents and settings\administrator\ desktop \cpp\test\debug\test.exe

	if (0 = strcmp (szbuf, "c:\\ Documents and settings\\administrator\\ Desktop \\cpp\\test\\Debug\\test.exe ")"
	{
		cout << "yes" << Endl   Yes
	}
	else
	{
		cout << "no" << Endl;
	}

	return 0;
}

Don't be surprised, \ is the escape symbol, \ \ Only represents a \, so the following code is wrong:

int main ()
{
	char c = ' \ ';//Error return
	0;
}

Based on the above discussion, let's get back to the point where the code for the current path is:

#include <windows.h>
#include <iostream>
#include <fstream>
using namespace std;

int main ()
{
	char   szbuf[1025] = {0};   
	GetModuleFileName (NULL, szbuf, sizeof (SZBUF));
	
	Char *p = STRRCHR (szbuf, ' \ \ '); 
	*p = ' n '; 

	strcat (Szbuf, "\\test.txt");  To emphasize, strcat is very unsafe

	cout << szbuf << Endl;//It is double slash, output shows a single slash of Ofstream outfile

	(SZBUF);//Will generate TE St.txt file
    outfile << "Hello World" << Endl;

	return 0;
}

In short, understanding the escape symbol, everything is simple.