Question

There is an array of objects and to add object to it i tries the following:

Shape ShapeList[30];

void addShape(Shape s)
{
  for(int i=0; i<30;i++)
  {
    if(ShapeList[i] != '\0')
        { i++;}
    else
        {
            ShapeList[i]=s;
            numShapes++;
            break;
        }
   }
}

numShapes is an integer variable, Shape is the class and ShapeList is the array of objects. But the compiler gives an error in this way that != operator is not allowed. So how can i implement this?

Answer 1

I think you need to change your ‘container’ declaration:

Shape *ShapeList[30];

void addShape(Shape *s)
{
  for(int i=0; i<30;i++)
  {
    if(ShapeList[i])
        { i++;}
    else
        {
            ShapeList[i]=s;
            numShapes++;
            break;
        }
   }
}

and call addShape this way:

addShape(new Shape());