Please, anyone can explain the syntax here?

Question

public:
Pair (T a, T b):
first(a), second(b) { }
between the (T a, T b) and {}, there are first(a) , second(b). what's the syntax mean?

Answer 1

The constructor initializes the variables 'first' and 'second' in class Pair with the values of 'a' and 'b'.

Answer 2

thank you Robobrine