C++ multimap operator<=

C++ operator<= is a non-member overloaded function of multimap. This function is used to check whether the first multimap is less than or equal to other or not.

Note: Operator <= compares element sequentially and at first mismatch comparison will stop.

Syntax

Parameter

lhs: First multimap object.

rhs: Second multimap object.

Return value

It returns true if the left side of the multimap object is less than or equal to the right side of the multimap object otherwise false.

Complexity

Complexity will be constant, if the size of lhs and rhs is different.

Otherwise, up to linear in the size (equality comparisons).

Iterator validity

No changes.

Data Races

Containers, lhs and rhs are accessed.

Exception Safety

This function does not throw an exception.

Example 1

Let's see the simple example to check whether the first multimap is less than or equal to or not:

Output:

Multimap m1 is less than or equal to m2.
Multimap m1 is not less than or equal to m2.

In the above example, there are two multimaps m1 and m2. m1 and m2 contains one element. When we compare both multimaps then it will display the message "multimap m1 is less than or equal to m2" and after adding one extra element in m1 then it will display the message that "multimap m1 is not less than or equal to m2".

Example 2

Let's see a simple example:

Output:

The multimap m1 is less than or equal to the multimap m2.
The multimap m1 is greater than the multimap m3.
The multimap m1 is less than or equal to the multimap m4.

Example 3

Let's see a simple example:

Output:

1
0

In the above example, if m1 is less than or equal to m2 then it will return 1 otherwise, 0.

Example 4

Output:

1).
---------Login----------

Enter the ID and password: 
1020     xyz
ID and password you have entered: 
1020     xyz
ID and Password stored in the system:
2040     [email protected]

Incorrect ID or Password...


2).
---------Login----------

Enter the ID and password: 
2040     [email protected]
ID and password you have entered: 
2040     [email protected]
ID and Password stored in the system:
2040     [email protected]

Welcome to your Page...

In the above example, there are two multimaps m1 and m2. m1 contains stored ID and password and second multimap m2 stores user's entered ID and password. It checks whether the m2 is less than or equal to m1 or not. If ID and password of m2 is less than or equal to m1 then login is successful otherwise login fails.