=====Deque operators===== Syntax:


    #include 
    TYPE& operator[]( size_type index );
    const TYPE& operator[]( size_type index ) const;
    deque& operator=(const deque& c2);
    bool operator==(const deque& c1, const deque& c2);
    bool operator!=(const deque& c1, const deque& c2);
    bool operator<(const deque& c1, const deque& c2);
    bool operator>(const deque& c1, const deque& c2);
    bool operator<=(const deque& c1, const deque& c2);
    bool operator>=(const deque& c1, const deque& c2);

All of the C++ containers can be compared and assigned with the standard comparison operators: ==, !=, <=, >=, <, >, and =. Individual elements of a deque can be examined with the [] operator. Performing a comparison or assigning one deque to another takes [[/complexity|linear time]]. The [] operator runs in [[/complexity|constant time]]. Two deques are equal if: - Their size is the same, and - Each member in location i in one deque is equal to the the member in location i in the other deque. Comparisons among deques are done lexicographically. For example, the following code uses the [] operator to access all of the elements of a deque:


   deque dq( 5, 1 );
   for( size_t i = 0; i < dq.size(); i++ ) {
     cout << "Element " << i << " is " << dq[i] << '\n';
   }