# std::subtract_with_carry_engine

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< cpp‎ | numeric‎ | random

Defined in header `<random>` |  |
template< class UIntType, size_t w, size_t s, size_t r > class subtract_with_carry_engine; |  | (since C++11)

`subtract_with_carry_engine` is a random number engine that uses subtract with carry algorithm.

| This section is incomplete

The following typedefs define the random number engine with two commonly used parameter sets:

Defined in header `<random>`
Type | Definition
`ranlux24_base`(C++11) | std::subtract_with_carry_engine< std::uint_fast32_t, 24, 10, 24>
`ranlux48_base`(C++11) | std::subtract_with_carry_engine< std::uint_fast64_t, 48, 5, 12>

### Member types

Member type | Definition
`result_type` | The integral type generated by the engine. Results are undefined if this is not an unsigned integral type.

### Member functions

##### Construction and Seeding

(constructor) | constructs the engine (public member function)
seed | sets the current state of the engine (public member function)

##### Generation

operator() | advances the engine's state and returns the generated value (public member function)
discard | advances the engine's state by a specified amount (public member function)

##### Characteristics

min [static] | gets the smallest possible value in the output range (public static member function)
max [static] | gets the largest possible value in the output range (public static member function)

### Non-member functions

operator==operator!= | compares the internal states of two pseudo-random number engines (function template)
operator<<operator>> | performs stream input and output on pseudo-random number engine (function template)

### Member objects

constexpr size_t word_size
[static]

| This section is incomplete

(public static member constant)

constexpr size_t short_lag
[static]

| This section is incomplete

(public static member constant)

constexpr size_t long_lag
[static]

| This section is incomplete

(public static member constant)

constexpr UIntType default_seed
[static]

| This section is incomplete

(public static member constant)

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