#include <stdlib.h>

class A {
public:
    int* p;
    A() {
        p = (int*)malloc(sizeof(int));
        *p = 0;
    }

    /*A(A& other) {
        this->p = (int*)malloc(sizeof(int));
        *(this->p) = *(other.p);
    }*/

    ~A() {
        if (p)
            free(p);
    }
};

int main() {
    A a1;
    A a2(a1);
    return 0;
}