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Category: functors Component type: type


Plus<T> is a function object. Specifically, it is an Adaptable Binary Function. If f is an object of class plus<T> and x and y are objects of class T, then f(x,y) returns x+y.


Each element in V3 will be the sum of the corresponding elements in V1 and V2
const int N = 1000;
vector<double> V1(N);
vector<double> V2(N);
vector<double> V3(N);

iota(V1.begin(), V1.end(), 1);
fill(V2.begin(), V2.end(), 75);

assert(V2.size() >= V1.size() && V3.size() >= V1.size());
transform(V1.begin(), V1.end(), V2.begin(), V3.begin(),


Defined in the standard header functional, and in the nonstandard backward-compatibility header function.h.

Template parameters

Parameter Description Default
T The function object's argument type and result type.  

Model of

Adaptable Binary Function, Default Constructible

Type requirements

T must be a numeric type; if x and y are objects of type T, then x+y must be defined and must have a return type that is convertible to T. T must be Assignable.

Public base classes

binary_function<T, T, T>


Member Where defined Description
first_argument_type Adaptable Binary Function The type of the first argument: T
second_argument_type Adaptable Binary Function The type of the second argument: T
result_type Adaptable Binary Function The type of the result: T
T operator()(const T& x, const T& y) Adaptable Binary Function Function call operator. The return value is x + y.
plus() Default Constructible The default constructor.

New members

All of plus's members are defined in the Adaptable Binary Function and Default Constructible requirements. Plus does not introduce any new members.


See also

The Function Object overview, Adaptable Binary Function, binary_function, minus, multiplies, divides, modulus, negate

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