CODEWITHSUNDEEP
c++
Kaisan
Kaisan

Reputation: 109

Can you initialise a pointer and the corresponding object in one line in c++?

class test {
    public:
    int& n;
    test(int& n) : n(n) {}
};

int main() {
    test* ptr = ptr(3); // something like this and 3 
 // should be a variable as pointed out in the comments
}

Can you initialise a pointer and the object that it points to in one line?

Upvotes: 0

Views: 565

Answers (1)

MikeCAT
MikeCAT

Reputation: 75062

Yes.

class test {
    public:
    int& n;
    test(int& n) : n(n) {}
};

int main() {
    int value = 3;
    test obj(value), *ptr = &obj;
}

Note that int& n cannot accept literal like 3.

Another choice is using new to create an object on the heap.

class test {
    public:
    int& n;
    test(int& n) : n(n) {}
};

int main() {
    int value = 3;
    test *ptr = new test(value); // create an object
    delete ptr; // delete the object
}

Upvotes: 3

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