<array> operators
The <array> header includes these array non-member comparison template functions.
operator!=
operator>
operator>=
operator<
operator<=
operator==
operator!=
Array comparison, not equal.
template <Ty, std::size_t N>
bool operator!=(
const array<Ty, N>& left,
const array<Ty, N>& right);
Parameters
Ty
The type of an element.
N
The size of the array.
left
Left container to compare.
right
Right container to compare.
Remarks
The template function returns !(left == right).
Example
// std__array__operator_ne.cpp
// compile with: /EHsc
#include <array>
#include <iostream>
typedef std::array<int, 4> Myarray;
int main()
{
Myarray c0 = {0, 1, 2, 3};
// display contents " 0 1 2 3"
for (Myarray::const_iterator it = c0.begin();
it != c0.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
Myarray c1 = {4, 5, 6, 7};
// display contents " 4 5 6 7"
for (Myarray::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
// display results of comparisons
std::cout << std::boolalpha << " " << (c0 != c0);
std::cout << std::endl;
std::cout << std::boolalpha << " " << (c0 != c1);
std::cout << std::endl;
return (0);
}
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false
true
operator<
Array comparison, less than.
template <Ty, std::size_t N>
bool operator<(
const array<Ty, N>& left,
const array<Ty, N>& right);
Parameters
Ty
The type of an element.
N
The size of the array.
left
Left container to compare.
right
Right container to compare.
Remarks
The template function overloads operator< to compare two objects of class template array Class. The function returns lexicographical_compare(left.begin(), left.end(), right.begin()).
Example
// std__array__operator_lt.cpp
// compile with: /EHsc
#include <array>
#include <iostream>
typedef std::array<int, 4> Myarray;
int main()
{
Myarray c0 = {0, 1, 2, 3};
// display contents " 0 1 2 3"
for (Myarray::const_iterator it = c0.begin();
it != c0.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
Myarray c1 = {4, 5, 6, 7};
// display contents " 4 5 6 7"
for (Myarray::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
// display results of comparisons
std::cout << std::boolalpha << " " << (c0 < c0);
std::cout << std::endl;
std::cout << std::boolalpha << " " << (c0 < c1);
std::cout << std::endl;
return (0);
}
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false
true
operator<=
Array comparison, less than or equal.
template <Ty, std::size_t N>
bool operator<=(
const array<Ty, N>& left,
const array<Ty, N>& right);
Parameters
Ty
The type of an element.
N
The size of the array.
left
Left container to compare.
right
Right container to compare.
Remarks
The template function returns !(right < left).
Example
// std__array__operator_le.cpp
// compile with: /EHsc
#include <array>
#include <iostream>
typedef std::array<int, 4> Myarray;
int main()
{
Myarray c0 = {0, 1, 2, 3};
// display contents " 0 1 2 3"
for (Myarray::const_iterator it = c0.begin();
it != c0.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
Myarray c1 = {4, 5, 6, 7};
// display contents " 4 5 6 7"
for (Myarray::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
// display results of comparisons
std::cout << std::boolalpha << " " << (c0 <= c0);
std::cout << std::endl;
std::cout << std::boolalpha << " " << (c1 <= c0);
std::cout << std::endl;
return (0);
}
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true
false
operator==
Array comparison, equal.
template <Ty, std::size_t N>
bool operator==(
const array<Ty, N>& left,
const array<Ty, N>& right);
Parameters
Ty
The type of an element.
N
The size of the array.
left
Left container to compare.
right
Right container to compare.
Remarks
The template function overloads operator== to compare two objects of class template array Class. The function returns equal(left.begin(), left.end(), right.begin()).
Example
// std__array__operator_eq.cpp
// compile with: /EHsc
#include <array>
#include <iostream>
typedef std::array<int, 4> Myarray;
int main()
{
Myarray c0 = {0, 1, 2, 3};
// display contents " 0 1 2 3"
for (Myarray::const_iterator it = c0.begin();
it != c0.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
Myarray c1 = {4, 5, 6, 7};
// display contents " 4 5 6 7"
for (Myarray::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
// display results of comparisons
std::cout << std::boolalpha << " " << (c0 == c0);
std::cout << std::endl;
std::cout << std::boolalpha << " " << (c0 == c1);
std::cout << std::endl;
return (0);
}
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true
false
operator>
Array comparison, greater than.
template <Ty, std::size_t N>
bool operator>(
const array<Ty, N>& left,
const array<Ty, N>& right);
Parameters
Ty
The type of an element.
N
The size of the array.
left
Left container to compare.
right
Right container to compare.
Remarks
The template function returns (right < left).
Example
// std__array__operator_gt.cpp
// compile with: /EHsc
#include <array>
#include <iostream>
typedef std::array<int, 4> Myarray;
int main()
{
Myarray c0 = {0, 1, 2, 3};
// display contents " 0 1 2 3"
for (Myarray::const_iterator it = c0.begin();
it != c0.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
Myarray c1 = {4, 5, 6, 7};
// display contents " 4 5 6 7"
for (Myarray::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
// display results of comparisons
std::cout << std::boolalpha << " " << (c0 > c0);
std::cout << std::endl;
std::cout << std::boolalpha << " " << (c1 > c0);
std::cout << std::endl;
return (0);
}
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false
true
operator>=
Array comparison, greater than or equal.
template <Ty, std::size_t N>
bool operator>=(
const array<Ty, N>& left,
const array<Ty, N>& right);
Parameters
Ty
The type of an element.
N
The size of the array.
left
Left container to compare.
right
Right container to compare.
Remarks
The template function returns !(left < right).
Example
// std__array__operator_ge.cpp
// compile with: /EHsc
#include <array>
#include <iostream>
typedef std::array<int, 4> Myarray;
int main()
{
Myarray c0 = {0, 1, 2, 3};
// display contents " 0 1 2 3"
for (Myarray::const_iterator it = c0.begin();
it != c0.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
Myarray c1 = {4, 5, 6, 7};
// display contents " 4 5 6 7"
for (Myarray::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " " << *it;
std::cout << std::endl;
// display results of comparisons
std::cout << std::boolalpha << " " << (c0 >= c0);
std::cout << std::endl;
std::cout << std::boolalpha << " " << (c0 >= c1);
std::cout << std::endl;
return (0);
}
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true
false
See also
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