#include <iostream>
#include<string>
#include <vector>

using namespace std;
class CNum{
public:
    CNum(){
        pi_num = new int(11);
    }
    CNum(CNum &other){
        pi_num = new int(*other.pi_num);
    }
    ~CNum(){
        if(pi_num!=NULL) delete pi_num;
    }
    int iGetVal(){
        return *pi_num;
    }
    CNum operator + (CNum &other){
        CNum result;
        *result.pi_num=*pi_num+*other.pi_num;
        return result;
    }
    void operator = (int val){
        *pi_num=val;
    }

private:
    int *pi_num;
};

int main() {
    CNum c_t0, c_t1, c_t2;
    cout<<c_t2.iGetVal();
    c_t0=2;
    c_t1=3;
    CNum csum;
    c_t0+c_t1;
    csum = c_t0 + c_t1;
    cout<<c_t0.iGetVal();
    cout<<csum.iGetVal();
}