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C++ algorithm find_first_of() function

❮ Algorithm Functions


Example

Find one of a number of values in a vector:

vector<int> numbers = {1, 7, 3, 5, 9, 2};
vector<int> search = { 2, 3, 9 };
auto it = find_first_of(numbers.begin(), numbers.end(), search.begin(), search.end());
if (it != numbers.end()) {
  cout << "The number " << *it << " was found!";
} else {
  cout << "None of the values were found.";
}
Try it Yourself »

Definition and Usage

The find_first_of() function returns an iterator pointing to the first occurrence in a data range of any of the specified values. If none of the values are found then it returns the iterator pointing to the end of the data range.

The range of data is specified by iterators. The values to search for are specified by another data range.

Syntax

find_first_of(iterator start, iterator end, iterator values_start, iterator values_end);

Parameter Values

Parameter Description
start Required. An iterator pointing to the start of the data range being searched.
end Required. An iterator pointing to the end of the data range being searched. Elements up to this position will be searched, but the element at this position will not be included.
values_start Required. An iterator pointing to the start of a data range containing the values to search for.
values_end Required. An iterator pointing to the end of a data range containing the values to search for.

Technical Details

Returns: An iterator pointing to the first occurrence in the data range of any of the specified values, or the end of the data range if none of the values were found.

Related Pages

Read more about data structures in our Data Structures Tutorial.

Read more about iterators in our Iterators Tutorial.

Read more about algorithms in our Algorithms Tutorial.


❮ Algorithm Functions

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