Template class example

templatearr.cpp

template <class T>
class Array5 {
public:
    T data[5];
};

int main() {
    Array5<int> intarr;
    intarr.data[0] = 3;
    Array5<string> strarr;
    strarr.data[2] = "meow";
}

//When the compiler compiles it, it sees that you use the class Array5<int> and Array5<string>. It generates these classes by replacing every instance of "T" in Array5 with "int" or "string", and the result would look like:

class Array5<int> {
public:
    int data[5];
};

class Array5<string> {
public:
    string data[5];
};