C# DLL failed to load

#include <iostream>
#include <Windows.h>

typedef void(__cdecl* DEBUG)();

int main() {
    HMODULE hModule = LoadLibraryA("HttCppLibrary.dll");
    if (hModule != NULL) {
        auto debug = (DEBUG)GetProcAddress(hModule, "DEBUG");
        debug();
        std::cout << "debug is called\n";
        FreeLibrary(hModule);
    }
    else {
        std::cout << "Failed to load DLL" << std::endl;
    }

    return 0;
}