Arrays of classes

Part of ArraysCategory

Description

How to allocate arrays of classes and pass them to functions.

Example

import std.c.stdio;
import std.string;

class A {    
    int n;
    
    this(int n1)
    {
        n = n1;
        // we are in the constructor
        printf("Constructor (n = %d)\n", n);
    }
    
    // operator to convert class A to a string
    char[] toString()
    {
        char[] ris;
        ris = .toString(n);
        return ris;
    }    
}

void Print(A[] a)
{   
    // print all the elements of array "a"
    for (int i = 0; i < a.length; i++) {
        printf("A%.*s\n", .toString(a[i].n));
    }
}

int main(char[][] args)
{
    A[] a;
    
    // allocate the memory
    a.length = 5;
    // i is a counter, j gets a pointer to A
    foreach (int i, A j; a) {
        // allocate the element j and copy the reference to a[i]
        a[i] = j = new A(i);
        printf("A%.*s\n", j.toString());
    }
    Print(a);
    return 0;
}

Source

Link	http://www.dsource.org/tutorials/index.php?show_example=151
Posted by	Anonymous