Executing a system command that returns the output of that command

So I have this code that executes a system command and returns the output.

std::string ExecCmd(std::string command) {
    char buffer[128];
    std::string result = "";
    FILE* pipe = _popen(command.c_str(), "r");
    if (!pipe) {
        return "popen failed!";
    }
    while (!feof(pipe)) {

        if (fgets(buffer, 128, pipe) != NULL)
            result += buffer;
    }

    _pclose(pipe);
    return result;
}

This code works really well, except for one part: Everytime this function is executed the command is executed in a seperate subprocess, so I do not have "context", which I really need. Example:

std::cout << Control::ExecCmd("cd myfolder");
std::cout << Control::ExecCmd("cd");

this prints C:\Users\spata\Desktop\, not C:\Users\spata\Desktop\myfolder which it is supposed to. How do I make it so that I can execute commands in the same "context", while being able to retrieve the output? Keep in mind I cant just merge all the commands into one, they need to be executed separately, but in the same context. Happy new year everyone!

I tried to tinker with batch files, however that still didnt work, and batch files are inconvenient.