!rant
C++ / OOP QUESTION

I have a uni assignment / project (Data Structures class), where I have to implement the ins-n-outs of 1D arrays, by creating a dynamically allocated array class, which can accept any type of data (using templates). But there's a problem.

I'd like to implement sorting the elements of the array. But given the fact, that I'm using templates, I cannot treat the elements as integers, nor as strings, or other types...
Also, let's say that the elements of the array are elements of class T, where T looks like this:

class T {
private:
double height;
int age;
string name;
public:
double getH() { return height; }
int getAge() { return age; }
string getName() { return name; }
};

(It's just a random example, pls don't judge for code quality...)

Let's say that I'd like to sort the T elements based on height, print out, sort by age, print out, then sort by name and print out. How can I do this? Is this possible?