how can i handle an invalid exception handler routine?

I'm building a program, that creates and deletes directories. I use the MSVC compiler (Visual Studio 2017), which is the reason i can't use "getcwd()" or "dirent.h" respectively. I have tried several different ways to get the current working directory, but there was always a problem. I managed to print the cwd with "_wgetcwd()". However I couldn't find how I could convert it's output to use it in "_rmdir()" or "_wrmdir()" in my research.

My main goal is to be able to remove a directory without having to install some new compiler. If this condition is met, any help is appreciated, because I already tried to install a different Compiler, but I didn't got it to work. I also tried different ways to get the cwd and convert it into the desired datatype, but nothing worked with the scope of my IDE and my very basic knowledge.

I'm pretty much a beginner in programming and I'm learning with this book, that unfortunately uses "dirent.h". The following is a snippet of my current code, where I have eradicated all errors. However I still get this last annoying exception:

#include <iostream>
#include <stdlib.h>
#include<string>
#include <direct.h>

int main() {

    int t = 0;
    std::string str;
    char xy = ' ';
    char* _DstBuf = &xy;
    const char* uniquename;
    uniquename = _getdcwd(0, _DstBuf, _MAX_PATH);
    std::cout << "Current path is ";    
    while (*uniquename != '\0') // this pointer points to the beginning of my path
    {
        std::cout << char(*uniquename); //  prints one char of the path name for each iteration

        char var = char(*uniquename);

        str.push_back(var); //here the exception below is thrown.

        // jump to the next block of memory
        uniquename++;
    }
    std::cout << str <<'\n';

    const char* lastchance = str.c_str();

    if (_wchdir('..')) {
        std::cout << "changing directory failed.\n";
    }

    if (_rmdir(lastchance) == -1 && errno == ENOTEMPTY) { 
        std::cout << "Given path is not a directory, the directory is not empty, or the directory is either the current working directory or the root directory.\n";
    }
    else if (_rmdir(lastchance) == -1 && errno == ENOENT) 
    {
        std::cout << "Path is invalid.\n";
    }
    else if (_rmdir(lastchance) == -1 && errno == EACCES)
    {
        std::cout << "A program has an open handle to the directory.\n";
    }
    else if (_rmdir(lastchance)) {
        std::cout << "removing directory still not possible\n";
    }

}

This is the exception I get: Unhandled exception at 0x6E656D69 in Experimentfile.exe: 0xC00001A5: An invalid exception handler routine has been detected (parameters: 0x00000003).

So if you are going to program in a C style (even though you have a C++ compiler) you're going to have to learn how arrays and pointers work. It's far too big a topic to learn from the internet you need a good book.

However I'll point out some of the errors

char xy = ' ';
char* _DstBuf = &xy;
const char* uniquename;
uniquename = _getdcwd(0, _DstBuf, _MAX_PATH);

This is just hopelessly wrong. It compiles but that doesn't mean it's going to work. This is what's required

char DstBuf[_MAX_PATH];
_getdcwd(0, DstBuf, _MAX_PATH);

_getdcwd requires an array which is passed as a pointer (see, you need to learn about arrays and pointers).

Then you attempt to print out the result and assign the result to a string. Again the code is way more complex than it needs to be. Here's the simpler version

std::string str = DstBuf;
std::cout << str <<'\n';

Then you attempt to change directories. I don't know why you are using the wide version _wchdir when you have narrow strings, use _chdir instead. And again the parameter is incorrect, '..' is a multi character literal, but _chdir requires a C-string. Here's the correct verison using _chdir.

if (_chdir("..")) {
    std::cout << "changing directory failed.\n";
} 

Then you try to remove a directory four times, obviously you can't remove a directory more than once.

And so on, and so on.