random c++ stuff

const pointer.cc

int main(int argc, char **argv) {
    int num = 42;
    
    // marks value the ptr is refering as constant
    const int *p1 = #
    
    // (*p1)++; // illegal
    p1++; // legal
    
    ///////////////////////////////////////////////////
    
    // marks the ptr address as constant
    int * const p2 = #
    
    (*p2)++; // legal
    // p2++; // illegal
    
    ///////////////////////////////////////////////////
    
    // marks value the ptr is refering as constant
    // marks the ptr address as constant
    const int * const p3 = #
    
    // (*p3)++; // illegal
    // p3++; // illegal

    return 0;
}

type operator.cc

#include <iostream>

class Example {
public:
    int number;

    Example(int number) : number(number) {}
    
    // returns a const reference of the public attribute number
    operator const int& () const {
        return number;
    }
};

int main(int argc, char **argv) {
    Example e(40);
    int a = 2;
    int b = e + a;

    std::cout << b << std::endl;

    return 0;
}