Dynamic Memory Allocation in C++
Ever wondered how you can create a resizable array in C/C++? I will not be discussing the C stuff here since I'm not at all that good in C. So let's try to take a look on how to make dynamic memory allocation in C++.
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| class MyClass
{
private:
int *myvararray;
public:
MyClass(int n)
{
myvararray = new int ;
}
} |
Here, you create a pointer to an int. Then using the new operator(C++ only) create an array
with n size. That's how easy it is actually. But how about when you need to make dynamic
memory allocation for pointer types? Here is a snippet just on how to do that. This is taken
from the Animation class that I created for my game.
Make a pointer, to the pointer
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| BITMAP** animationFrames; //this is a member |
then for example, you in your constructor you can do it like this.
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| animationFrames = new BITMAP*[maxFrames];
for (int i = 0; i < maxFrames; i++)
{
animationFrames = create_sub_bitmap(bitmap, currentX, 0, frameWidth, frameHeight);
currentX += frameWidth;
} |
Simple isn't it? Hope that helps! ;)