Книга: Standard Template Library Programmer
minus
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minus<T>
Category: functors
Component type: type
Description
Minus<T> is a function object. Specifically, it is an Adaptable Binary Function. If f is an object of class minus<T> and x and y are objects of class T, then f(x,y) returns x-y.
Example
Each element in V3 will be the difference 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(), minus<double>());
Definition
Defined in the standard header functional, and in the nonstandard backward-compatibility header function.h.
Template parameters
| Parameter | Description |
|---|---|
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>
Members
| 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. |
minus() |
Default Constructible | The default constructor. |
New members
All of minus's members are defined in the Adaptable Binary Function and Default Constructible requirements. Minus does not introduce any new members.
See also
The Function Object overview, Adaptable Binary Function, binary_function, plus, multiplies, divides, modulus, negate
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