On Tuesday, 23 January 2024 at 18:15:29 UTC, Stephen Tashiro
wrote:
If the constructor of a class needs to create an array of
structs whose dimensions are inputs, what's the syntax for
doing this?
For a non-example, the following program errors in main()
because in t.array[][] "index [0] is out of bounds".
import std.stdio;
struct Point
{
uint x;
uint y;
void printInfo()
{
printf("(%d $d )",x,y);
}
}
class testClass
{
uint dimension;
Point[][] array;
this(uint the_dimension)
{
dimension = the_dimension;
auto array = new Point[][](the_dimension,the_dimension);
for(uint i = 0; i < dimension; i++)
{
for(uint j = 0; j < dimension; j++)
{
array[i][j].x = i;
array[i][j].y = j;
}
}
}
}
void main()
{
auto t = new testClass(5);
for(uint i = 0; i < t.dimension; i++)
{
for(uint j = 0; j < t.dimension; j++)
{
printf("(%d %d)",t.array[i][j].x, t.array[i][j].y);
//t.array[i][j].printInfo();
}
}
}
This works , your mistake was to not actually assign the array to
the class' field!
Change this line:
```d
auto array = new Point[][](the_dimension,the_dimension);
```
To this:
```d
this.array = new Point[][](the_dimension,the_dimension);
```
