Infinite Arrays?

How can I make an infinite-size array? I saw something about vector<type> but I'm a bit confused on how to use them... help?

You can't make an infinite array unless you have infinite memory. But you can use a container that grows as needed:

Code:

---

#include <iostream>
#include <vector>

int main()
{
  std::vector<int> v; // Define a vector of int called v

  // Append 10 values to the vector
  for (int i = 0; i < 10; i++)
    v.push_back(i);

  // Print out all elements of the vector
  for (int i = 0; i < v.size(); i++)
    std::cout<< v.at(i) <<'\n';
}

---

Thanks!

Question: Is there any way to use those with structs? Like vector<struct> or something?

you can have any type in a vector, including another vector ;)

Well, by this, I mean like having multiple structs. You know, like:

Code:

---

struct blah_struct[] {
int blah_var;
} blah[10]

---

How would I have a vector replace the blah[10]?

In your example the type of your structure is blah_struct. Just replace int with the name of your type:

Code:

---

#include <iostream>
#include <vector>
 
struct blah_struct {
int blah_var;
};
 
int main()
{
  // Define a vector of blah_struct called v starting with 10 objects.
  std::vector<blah_struct> blah_vector(10);
 
  // Print out all elements of the vector
  for (int i = 0; i < blah_vector.size(); i++)
        std::cout<< blah_vector.at(i).blah_var <<'\n';
}

---

If your struct is not a simple one with only POD objects, you'll have to be careful about using it in a container. It might need a copy constructor and copy assignment operator.