C++ code

Question

Could someone explain this c++ code?
https://code.sololearn.com/cyURK7t9aHU0/#cpp

Answer 1

0xa is hexa decimal value of 10.
Stored in int a;
cout << hex <<a; //prints the values in hexadecimal format. So print a;
To look differents try this:

#include <iostream>
using namespace std;

int main() {
int a =0xa;
cout<<a;
cout << hex << a;
return 0;
}