This is the first line of code i've written, thoughts?

#include<iostream>
using namespace std;

int main()
{
char stupid;
cout << "Are you stupid ?";
cin >> stupid;

if (stupid ='yes') {
cout << "You are indeed stupid lmao XD ";
} else if (stupid ='no') {
cout << "You are smart";
} else
cout << "You are stupidder than stupid ";
}


return 0;