Standard Template Library Programmer's Guide

[2] Random number generators are a very subtle subject: a good random number generator must satisfy many statistical properties beyond uniform distribution. See section 3.4 of Knuth for a discussion of what it means for a sequence to be random, and section 3.2 for several algorithms that may be used to write random number generators. (D. E. Knuth, The Art of Computer Programming. Volume 2: Seminumerical Algorithms , third edition. Addison-Wesley, 1998.)

Category: functors

Component type: type

Plus is a function object. Specifically, it is an Adaptable Binary Function. If f is an object of class plus 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 V1(N);

vector V2(N);

vector 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(), plus());

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

Adaptable Binary Function, Default Constructible

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.

binary_function

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

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

Category: functors

Component type: type

Minus is a function object. Specifically, it is an Adaptable Binary Function. If f is an object of class minus and x and y are objects of class T , then f(x,y) returns x-y .

Each element in V3 will be the difference of the corresponding elements in V1 and V2

const int N = 1000;

vector V1(N);

vector V2(N);

vector 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());

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

Adaptable Binary Function, Default Constructible

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.

binary_function

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

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

Category: functors

Component type: type

Multiplies [1] is a function object. Specifically, it is an Adaptable Binary Function. If f is an object of class multiplies and x and y are objects of class , then f(x,y) returns x*y .

Each element in V3 will be the product of the corresponding elements in V1 and V2

const int N = 1000;

vector V1(N);

vector V2(N);

vector 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(), multiplies());