array of objects with multiple parameters

Question

How do I switch both parameters of the class to the object that I am creating? What is the syntax? (They must receive all the same parameters)

#include <iostream>

using namespace std;

class MyClass
{
    public:
        MyClass(int x,int y):value(x),value2(y)
        {
            //nothing
        }
        int value=10;
        int value2;
};

int main()
{
    MyClass ob1[5]; //Here! What is the correct syntax?
    cout << ob1[0].value << endl;
    return 0;
}

Would this work? MyClass ob1[5] = {(1,1),(2,2),(3,3),(4,4),(5,5)}? OR MyClass ob1[5] = {MyClass(1,1), MyClass(2,2), MyClass(3,3), MyClass(4,4), MyClass(5,5)} — masood elsad
– masood elsad, Commented Apr 9, 2017 at 15:32
FWIW, std::vector has a constructor to create N copies of something. It means an allocation and everything, though. — Qaz
– Qaz, Commented Apr 9, 2017 at 15:42
@George you're right, sorry, I had to specify... however, they had to be all the same! Thanks a lot to everyone! — nostyn
– nostyn, Commented Apr 9, 2017 at 15:52

Paul Floyd · Accepted Answer · 2017-04-09 15:35:17Z

2

You can use

MyClass ob1[] = {{1,2},{2,3},{3,4},{4,5},{5,6}};

(if you're using C++11 or later).

However, it would be better to use a std::vector or std::array.

answered Apr 9, 2017 at 15:35

Paul Floyd

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1 Comment

Ivaylo Valchev Over a year ago

Not if the constructor is marked explicit though. Just nitpicking.

masood elsad · Accepted Answer · 2017-04-10 06:16:04Z

-1

Try these two

 MyClass ob1[5] = {{1,1},{2,2},{3,3},{4,4},{5,5}};

OR

MyClass ob1[5] = {MyClass(1,1), MyClass(2,2), MyClass(3,3), MyClass(4,4), MyClass(5,5)};

edited Apr 10, 2017 at 6:16

answered Apr 9, 2017 at 15:34

masood elsad

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2 Comments

Ivaylo Valchev Over a year ago

Are you sure about the first one?

Qaz Over a year ago

Yeah, the first one needs braces rather than parentheses.

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