how to declare dynamic struct

[bshrestha]

#include <iostream>

using namespace std;

struct test
{
int a;
int b;
};

const int size = 10;

int main()
{
test *p = new test[size]; // ???? is it the way to declare dynamic struct.

...
...

return 0;
}

Guys please help me on the dynmaic struct in c++. I am using VS 2010.

[R0mai]

If you mean that you want to create an array which's size you don't know at compile time, then it is the way.. or at least very close.

1.: Your size variable is a constant, therefore it can be used to create static arrays as well. For dynamic arrays, it could be a non-constant variable.

//Static arrays
const int size = 10;
test p[size];

2.: If you use new, or new[], always use a delete or delete[] as well (otherwise, you will get a memory leak), in your case :

test *p = new test[size];
//do stuff with p
delete[] p;

3.: I highly recommend using std::vector. You can declare it's size dynamically, AND you can easily change it's size dynamically as well. Also, you don't have to worry about new-ing and delete-ing, it is done automatically.
For more information : http://www.cplusplus.com/reference/stl/vector/