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?
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'; }
My best code is written with the delete key.
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:
How would I have a vector replace the blah[10]?Code:struct blah_struct[] { int blah_var; } blah[10]
In your example the type of your structure is blah_struct. Just replace int with the name of your type: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.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'; }
