Why are two strings with same content different while using wchar_t?

I am writing a code for comparing two strings of type LPSTR and wchar_t type. The contents of strings are same but the output is showing that the strings are different. Below is screenshot of the complete code.

#include <iostream>
#include <string.h>
#include <wtypes.h>
using namespace std;
int main(int argc, char** argv) 
{
    LPSTR str1= "Abcdef123456";
    wchar_t *str2 = L"Abcdef123456";
    if(!strcmp((char *)str1, (char *)str2))
    {
        cout<<"same";   
    }
    else
    {
            cout<<"diff";
    }

    return 0;
}

Upon execution, the output is diff. I think the output should be same. Please help.

L'A' has a different representation in memory than 'A'. If you pretend that an array of wchar_t is an array of char (by explicit conversion char*) and compare it to another array of char with different representation, they will compare different.

The output is as expected.

A correct way to compare the strings is to convert the narrow string to a wide string. That isn't exactly trivial to do correctly, so here is an example:

auto length = std::strlen(str1);
std::wstring temp(length, L'\0');
std::mbstowcs(&temp[0], str1, length);
if (!wcscmp(temp.c_str(), str2))
   // ...