<deque> operators
The latest version of this topic can be found at <deque> operators.
| operator!= | operator> | operator>= |
| operator< | operator<= | operator== |
operator!=
Tests if the deque object on the left side of the operator is not equal to the deque object on the right side.
bool operator!=(const deque<Type, Allocator>& left, const deque<Type, Allocator>& right);
Parameters
left
An object of type deque.
right
An object of type deque.
Return Value
true if the deque objects are not equal; false if the deque objects are equal.
Remarks
The comparison between deque objects is based on a pairwise comparison of their elements. Two deque objects are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
Example
// deque_op_ne.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1, c2;
c1.push_back( 1 );
c2.push_back( 2 );
if ( c1 != c2 )
cout << "The deques are not equal." << endl;
else
cout << "The deques are equal." << endl;
}
\* Output:
The deques are not equal.
*\
operator<
Tests if the deque object on the left side of the operator is less than the deque object on the right side.
bool operator<(const deque<Type, Allocator>& left, const deque<Type, Allocator>& right);
Parameters
left
An object of type deque.
right
An object of type deque.
Return Value
true if the deque on the left side of the operator is less than and not equal to the deque on the right side of the operator; otherwise false.
Remarks
The comparison between deque objects is based on a pairwise comparison of their elements. The less-than relationship between two objects is based on a comparison of the first pair of unequal elements.
Example
// deque_op_lt.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1, c2;
c1.push_back( 1 );
c1.push_back( 2 );
c1.push_back( 4 );
c2.push_back( 1 );
c2.push_back( 3 );
if ( c1 < c2 )
cout << "Deque c1 is less than deque c2." << endl;
else
cout << "Deque c1 is not less than deque c2." << endl;
}
\* Output:
Deque c1 is less than deque c2.
*\
operator<=
Tests if the deque object on the left side of the operator is less than or equal to the deque object on the right side.
bool operator<=(const deque<Type, Allocator>& left, const deque<Type, Allocator>& right);
Parameters
left
An object of type deque.
right
An object of type deque.
Return Value
true if the deque on the left side of the operator is less than or equal to the deque on the right side of the operator; otherwise false.
Remarks
The comparison between deque objects is based on a pairwise comparison of their elements. The less than or equal to relationship between two objects is based on a comparison of the first pair of unequal elements.
Example
// deque_op_le.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1, c2;
c1.push_back( 1 );
c1.push_back( 2 );
c1.push_back( 4 );
c2.push_back( 1 );
c2.push_back( 3 );
if ( c1 <= c2 )
cout << "Deque c1 is less than or equal to deque c2." << endl;
else
cout << "Deque c1 is greater than deque c2." << endl;
}
\* Output:
Deque c1 is less than or equal to deque c2.
*\
operator==
Tests if the deque object on the left side of the operator is equal to the deque object on the right side.
bool operator==(const deque<Type, Allocator>& left, const deque<Type, Allocator>& right);
Parameters
left
An object of type deque.
right
An object of type deque.
Return Value
true if the deque on the left side of the operator is equal to the deque on the right side of the operator; otherwise false.
Remarks
The comparison between deque objects is based on a pairwise comparison of their elements. Two deques are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
Example
// deque_op_eq.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1, c2;
c1.push_back( 1 );
c2.push_back( 1 );
if ( c1 == c2 )
cout << "The deques are equal." << endl;
else
cout << "The deques are not equal." << endl;
c1.push_back( 1 );
if ( c1 == c2 )
cout << "The deques are equal." << endl;
else
cout << "The deques are not equal." << endl;
}
\* Output:
The deques are equal.
The deques are not equal.
*\
operator>
Tests if the deque object on the left side of the operator is greater than the deque object on the right side.
bool operator>(const deque<Type, Allocator>& left, const deque<Type, Allocator>& right);
Parameters
left
An object of type deque.
right
An object of type deque.
Return Value
true if the deque on the left side of the operator is greater than the deque on the right side of the operator; otherwise false.
Remarks
The comparison between deque objects is based on a pairwise comparison of their elements. The greater-than relationship between two objects is based on a comparison of the first pair of unequal elements.
Example
// deque_op_gt.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1, c2;
c1.push_back( 1 );
c1.push_back( 3 );
c1.push_back( 1 );
c2.push_back( 1 );
c2.push_back( 2 );
c2.push_back( 2 );
if ( c1 > c2 )
cout << "Deque c1 is greater than deque c2." << endl;
else
cout << "Deque c1 is not greater than deque c2." << endl;
}
\* Output:
Deque c1 is greater than deque c2.
*\
operator>=
Tests if the deque object on the left side of the operator is greater than or equal to the deque object on the right side.
bool operator>=(const deque<Type, Allocator>& left, const deque<Type, Allocator>& right);
Parameters
left
An object of type deque.
right
An object of type deque.
Return Value
true if the deque on the left side of the operator is greater than or equal to the deque on the right side of the operator; otherwise false.
Remarks
The comparison between deque objects is based on a pairwise comparison of their elements. The greater than or equal to relationship between two objects is based on a comparison of the first pair of unequal elements.
Example
// deque_op_ge.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1, c2;
c1.push_back( 1 );
c1.push_back( 3 );
c1.push_back( 1 );
c2.push_back( 1 );
c2.push_back( 2 );
c2.push_back( 2 );
if ( c1 >= c2 )
cout << "Deque c1 is greater than or equal to deque c2." << endl;
else
cout << "Deque c1 is less than deque c2." << endl;
}
\* Output:
Deque c1 is greater than or equal to deque c2.
*\