I don't understand where error in this code please explain

i don’t understand where error in this code please explain
#include
using namespace std;
int main() {
char x,X;
cin>>x,X;
if(islower(x)){
cout<<“Lowercase”<<x;

}
else if(isupper(X)){
	cout<<"Uppercase"<<X;
	
}
else{
	cout<<"Invalid";
}
cout<<endl;


return 0;

}

hi @dheerajjha11111_bb855e8d7a52ef0d UPDATED