How to add new object to the array of objects in C++?

Question

I have two classes, namely Players and Team In the Team class, I have array of Players instances, and the MAX_SİZE = 11

#define MAX 11
class Players{
// Some private and public members 
};
class Team {
private:
    Players players[MAX];
// Some other private and public members
};

I want to implement the addNewPlayer method in my Team class. Whenever I call this method, I should be able to the add the name of the player to the end of this Players instances array, which is players. Now the function I consider is like :

void Team :: addNewPlayer(Players new_player){
       // add new_player to the end of the array
       }

I know the Stacks and Queues data structures as well. However, there is a restriction on using arrays only.
Is there any efficient way of adding new object to the array of objects in other class in general?

Players players[MAX]; You can't change the size of that - it's fixed at MAX. — 001
– 001, Commented Nov 18, 2021 at 19:51
In C++, arrays don't have a concept of "add to the end". If an array holds 11 Players, that size cannot change. It will always and only hold 11 Players. — Drew Dormann
– Drew Dormann, Commented Nov 18, 2021 at 19:51
@Johnny Mopp. Yes the size is fixed by 11, which is an upper bound. I can add at most 11 players to the team. What is wrong with this if the team is initally empty? — Yalçın Cenik
– Yalçın Cenik, Commented Nov 18, 2021 at 19:54
Don't. Replace array with std::vector and use std::vector::push_back(). — Thomas Matthews
– Thomas Matthews, Commented Nov 18, 2021 at 19:55

user11717481 · Accepted Answer · 2021-11-18 21:16:54Z

1

players array is defined within Team class. To assign it a size; you use the variable MAX, if this variable uses an appropriate value, suppose one different from its maximum capacity that depends on the hardware, you can try creating a new array replacing the one of the class with a new length and element:

void Team::addNewPlayer(Players new_player) {

    // add new_player to the end of the array
    int newSize = sizeof(players)/sizeof(players[0]);
    Players newArray[newSize+1];
    
    for (int i=0; i < newSize; i++) {
        newArray[i] = players[i];
    }

    newArray[newSize] = new_player;
    players = newArray;
}

edited Nov 18, 2021 at 21:16

answered Nov 18, 2021 at 21:01

user11717481

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Comments

Michael Eason · Accepted Answer · 2021-11-18 19:56:51Z

0

You'll need the current count of players in your team. Then you'll want to add a new_player to the players[currentcount]

answered Nov 18, 2021 at 19:56

Michael Eason

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1 Comment

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