The ‘==’ is an operator in C++ STL performs equality comparison operation between two unordered sets and unordered_set::operator== is the corresponding operator function for the same.
(unordered_set &uset1 == unordered_set &uset2)
Parameters: This operator function takes reference of two unordered sets uset1 and uset2 as parameters which are to be compared.
Return Value: This method returns a boolean result value after comparing the two sets. The comparison procedure is as follows:
- Firstly their sizes are compared .
- Then each element in ust1 is looked for in ust2
If both the conditions are satisfied true value is returned and at any point if a condition is not satisfied, false value is returned.
Below program illustrates unordered_set::operator== in C++.
sample1 and sample2 are equal. sample2 and sample3 are not equal.