Initialize an array within a struct

Hi all,

I'm implementing a list of arrays like so:

Code:

---

struct Cell {
    int arrayValues[5];
    Cell *next;
};
Cell *head;

---

How do I write the structure such that all arrayValues are set to 0? I'm trying to use a for loop

Code:

---

for(int i = 0; i < 5; i++)
    head->valueArray[i] = 0;

---

outside of the struct but I'm not sure what I'm doing. Thanks for your help!

That is what constructors are for:

Code:

---

#include <iostream>
using namespace std;

struct Cell
{
        Cell()
        {
                for(int i=0; i<5; ++i)
                {
                        data[i] = 0;
                }

                next = 0;
               
        }
       
        int data[5];
        Cell* next;
};       


int main () 
{
        Cell c;  //This statement calls the constructor
        cout<<c.data[4]<<endl;  //0

        cout<<">>>Hit Enter to Quit";
        cin.get();
        return 0;
}

---

You can accomplish the same thing outside the struct like this:

Code:

---

#include <iostream>
using namespace std;

struct Cell
{
        int data[5];
        Cell* next;
};       


int main () 
{
        Cell c;
               
        for(int i=0; i<5; ++i)
        {
                c.data[i] = 0;
        }
       
        c.next = 0;
       
        cout<<c.data[4]<<endl;  //0
       
        cout<<">>>Hit Enter to Quit";
        cin.get();
        return 0;
}

---

Ah, thanks a lot! I never knew about constructors in structs. Thanks again!

Quote:

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Originally Posted by slicktacker

I never knew about constructors in structs.

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C++ structs are exactly the same as C++ classes, with the tiny difference that the default visibility for struct members is public (private for class members).