pair
template <class T1, class T2> struct pair;- This class couples together a pair of values, which may be of different types (T1 and T2). The individual values can be accessed through its public members first and second.
- different types를 연결시켜주는 역할
- member function으로 constructor, assignment operator 오버로딩, non-member function으로 relational operators 있음. 나머지는 c++11.
- 멤버변수로 first, second 있음.
make_pair
template <class T1, class T2>
pair<T1,T2> make_pair (T1 x, T2 y);-
Constructs a pair object with its first element set to x and its second element set to y.
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The template types can be implicitly deduced from the arguments passed to make_pair.
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템플릿 유형은 make_pair에 전달된 인수를 통해 암시적으로 추론될 수 있음
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pair objects can be constructed from other pair objects containing different types, if the respective types are implicitly convertible.
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타입이 암시적으로 변환 가능한 경우 pair를 또 다른 pair가 포함할 수 있음.
