C++ program error on passing arguments to the parameterized constructor by pointer object?

Question

I have a class called sample.

class sample
{
private:
    int Age;
public:
    sample() : Age() {}
    sample(int age)
    {
        this->Age = age;
    }
};

In main

int main()
{
    sample* s = new sample();
    s(21);

    return 0;
}

I want to pass values to the parameterized constructor through pointer object but it's giving this error

expression preceding parentheses of apparent call must have (pointer-to-) function type

Alexey S. Larionov · Accepted Answer · 2020-12-10 13:02:09Z

1

You've already constructed the object when did new sample(), so you can pass your constructor values right there. You cannot construct the object twice.

Do it like this:

sample* s = new sample(21);

or

sample* s;
s = new sample(21);

answered Dec 10, 2020 at 13:02

Alexey S. Larionov

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2 Comments

catnip Over a year ago

Or even: sample s { 21 }; There's no obvious need for a pointer here at all.

costaparas Over a year ago

Its possible he requires a pointer for some subsequent use. Also, did you mean s = sample{21}?

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