CODEWITHSUNDEEP
c++copy-constructor
anonymous38653
anonymous38653

Reputation: 403

error in copy constructor opening up allocator.h

In the following code , I have created a class named ele, and I'm trying to store ele objects in a vector v. I am using deep copy by delegating copy constructor to the constructor with integer as an argument. I am getting an unusual error , a header file allocator.h opens up in my IDE(devC++) when I try to run it and I don't know what's going wrong.
If I comment out the copy constructor, the program runs with shallow copying without any compiler errors ( however, that is not what I want to do )

#include <iostream>
#include <vector>
using namespace std;
class ele{
    public:
    int* data_ptr;

    ele(int a) {
        data_ptr=new int;
        *data_ptr=a; 
        cout<<"new ele created with data="<<*data_ptr<<endl;
    }
    ele(ele &s):ele(*s.data_ptr) {
        cout<<"object with data="<<*data_ptr<<" copied"<<endl;
    }
    ~ele(){ 
        cout<<*data_ptr<<"destroyed"<<endl; 
        delete data_ptr; 
    }
};
void display(ele a){
    cout<<*a.data_ptr<<endl;
}
ele create(int k){
    ele* a=new ele(k);
    return *a;
}
int main(){
    vector <ele> v;
    int t=10;
    while(--t)
    {
        v.push_back(create(t));
    }
}

Upvotes: 0

Views: 318

Answers (1)

Mickael B.
Mickael B.

Reputation: 5215

This is because your copy constructor should take a const ele &

ele(const ele &s):ele(*s.data_ptr) {
    cout<<"object with data="<<*data_ptr<<" copied"<<endl;
}

Upvotes: 1

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