C++

Question

how is this code works? especially throw Ex("mistake");

#include <iostream>
class Ex{
std::string message;
public:
Ex(const std::string msg) : message(msg){}

std::string yaz(){
return message;
}
};

int main()
{ int a = 2;
try{
if(a<3)
throw Ex("mistake");
std::cout<<a + 3;
}
catch(Ex err){
std::cout<<err.yaz();
}
return 0;
}

Answer 1

Ex("mistake") is an object of class Ex with message set to "mistake"
You are throwing this object and catching by catch(Ex err), in that catch block, calling yaz() function which returns message