operator== (unordered_set)
Tests whether the unordered_set object on the left side of the operator is equal to the unordered_set object on the right side.
bool operator==(
const unordered_set <Key, Hash, Pred, Allocator>& _Left,
const unordered_set <Key, Hash, Pred, Allocator>& _Right
);
매개 변수
_Left
unordered_set 형식의 개체입니다._Right
unordered_set 형식의 개체입니다.
반환 값
true if the unordered_sets are equal; false if they are not equal.
설명
The comparison between unordered_set objects is not affected by the arbitrary order in which they store their elements. Two unordered_sets are equal if they have the same number of elements and the elements in one container are a permutation of the elements in the other container. 그렇지 않으면 두 개체는 서로 다른 개체입니다.
예제
// unordered_set_eq.cpp
// compile by using: cl.exe /EHsc /nologo /W4 /MTd
#include <unordered_set>
#include <iostream>
#include <ios>
int main()
{
using namespace std;
unordered_set<char> c1, c2, c3;
c1.insert('a');
c1.insert('b');
c1.insert('c');
c2.insert('c');
c2.insert('a');
c2.insert('d');
c3.insert('c');
c3.insert('a');
c3.insert('b');
cout << boolalpha;
cout << "c1 == c2: " << (c1 == c2) << endl;
cout << "c1 == c3: " << (c1 == c3) << endl;
cout << "c2 == c3: " << (c2 == c3) << endl;
return (0);
}
출력:
c1 == c2: false
c1 == c3: true
c2 == c3: false
요구 사항
헤더: <unordered_set>
네임스페이스: std