std::equal() in C++

std::equal() helps to compares the elements within the range [first_1,last_1) with those within range beginning at first_2. Syntax 1:

template 
 bool equal (InputIterator1 first1, InputIterator1 last1,
 InputIterator2 first2)
 
first_1, last_1 : Initial and final positions of the first
 sequence. All the elements are present within a range [first_1,last_1)
first2 : Initial position of the second sequence.

Returns : 
true, if all of the elements in both ranges match; otherwise false

Output:

Vector contains : 10, 20, 30, 40, 50
The contents of both sequences are equal.

Syntax 2:

template 
 bool equal (InputIterator1 first1, InputIterator1 last1,
 InputIterator2 first2, BinaryPredicate pred);

first_1, last_1 : Initial and final positions of the first
 sequence. All the elements are present within a range [first_1,last_1)
first2 : Initial position of the second sequence.
pred : Binary function that accepts two elements as argument 
 and returns a value convertible to boolean.

Returns : 
true, if all of the elements in both ranges match; otherwise false

Output:

Vector contains : 10, 20, 30, 40, 50
The contents of both sequences differ.

Time complexity: O(n)

Related Articles:

• std::max_element
• std::max
• std::min
• std::min_element in C++