Random
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]Random class
Represents a pseudo-random number generator. Objects of this class should only be allocated using System::MakeObject() function. Never create instance of this type on stack or using operator new, as it will result in runtime errors and/or assertion faults. Always wrap this class into System::SmartPtr pointer and use this pointer to pass it to functions as argument.
class Random : public System::Object
Methods
Method | Description |
---|---|
virtual bool Equals(ptr) | Compares objects using C# Object.Equals semantics. |
static std::enable_if<IsSmartPtr<T1>::value&&IsSmartPtr<T2>::value, bool>::type Equals(T1 const&, T2 const&) | Compares reference type objects in C# style. |
static std::enable_if<!IsSmartPtr<T1>::value&&!IsSmartPtr<T2>::value, bool>::type Equals(T1 const&, T2 const&) | Compares value type objects in C# style. |
static bool Equals(float const&, float const&) | Emulates C#-style floating point comparison where two NaNs are considered equal even though according to IEC 60559:1989 NaN is not equal to any value, including NaN. |
static bool Equals(double const&, double const&) | Emulates C#-style floating point comparison where two NaNs are considered equal even though according to IEC 60559:1989 NaN is not equal to any value, including NaN. |
virtual bool FastCast(const Details::FastRttiBase&, void **) const | For internal purposes only. |
Detail::SmartPtrCounter * GetCounter() | Gets reference counter data structure associated with the object. |
virtual int32_t GetHashCode() const | Analog of C# Object.GetHashCode() method. Enables hashing of custom objects. |
virtual const TypeInfo& GetType() const | Gets actual type of object. Analog of C# System.Object.GetType() call. |
virtual bool Is(const TypeInfo&) const | Check if object represents an instance of type described by targetType. Analog of C# ‘is’ operator. |
bool IsNull() const | Always returns false. |
void Lock() | Implements C# lock() statement locking. Call directly or use LockContext sentry object. |
virtual ptr MemberwiseClone() const | Analog of C# Object.MemberwiseClone() method. Enables cloning custom types. |
virtual int32_t Next() | Returns a nonnegative random number less then int32 max value. |
virtual int32_t Next(int32_t) | Returns a nonnegative random number less than the specified maximum. |
virtual int32_t Next(int32_t, int32_t) | Returns a random number within the specified range. |
virtual void NextBytes(const ArrayPtr<uint8_t>&) | Fills the elements of the specified array of bytes with random numbers. |
virtual double NextDouble() | Returns a random number between 0.0 and 1.0. |
Object() | Creates object. Initializes all internal data structures. |
Object(Object const&) | Copy constructor. Doesn’t copy anything, really, just initializes new object and enables copy constructing subclasses. |
Object& operator=(Object const&) | Assignment operator. Doesn’t copy anything, really, just initializes new object and enables copy constructing subclasses. |
Random() | Initializes a new instance, using a time-dependent default seed value. |
Random(int32_t) | Initializes a new instance of the System.Random class, using the specified seed value. |
static bool ReferenceEquals(ptr const&, ptr const&) | Compares objects by reference. |
static std::enable_if<!IsSmartPtr<T>::value, bool>::type ReferenceEquals(T const&, T const&) | Compares objects by reference. |
static std::enable_if<!IsSmartPtr<T>::value, bool>::type ReferenceEquals(T const&, std::nullptr_t) | Reference-compares value type object with nullptr. |
bool ReferenceEquals(String const&, std::nullptr_t) | Specialization of Object::ReferenceEquals for case of string and nullptr. |
bool ReferenceEquals(String const&, String const&) | Specialization of Object::ReferenceEquals for case of strings. |
int RemovedSharedRefs(int) | Decreases shared reference count by specified value. |
virtual void SetTemplateWeakPtr(uint32_t) | Set n’th template argument a weak pointer (rather than shared). Allows switching pointers in containers to weak mode. |
int SharedCount() const | Gets current value of shared reference counter. |
Object * SharedRefAdded() | Increments shared reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector. |
int SharedRefRemovedSafe() | Decrements and returns shared reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector. |
virtual String ToString() const | Analog of C# Object.ToString() method. Enables converting custom objects to string. |
static const TypeInfo& Type() | Implements C# typeof(System.Object) construct. |
void Unlock() | Implements C# lock() statement unlocking. Call directly or use LockContext sentry object. |
Detail::SmartPtrCounter * WeakRefAdded() | Increments weak reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector. |
void WeakRefRemoved() | Decrements weak reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector. |
virtual ~Object() | Destroys object. Frees all internal data structures. |
Remarks
#include "system/random.h"
#include "system/smart_ptr.h"
#include <iostream>
int main()
{
const auto rnd = System::MakeObject<System::Random>();
// Get a random month number and print it.
auto monthNumber = rnd->Next(1, 13);
std::cout << "Month: " << monthNumber << std::endl;
// Fill the array with random numbers.
auto arr = System::MakeObject<System::Array<uint8_t>>(12);
rnd->NextBytes(arr);
// Print the array.
for (auto i = 0; i < arr->get_Length(); ++i)
{
std::cout << static_cast<int>(arr[i]) << ' ';
}
std::cout << std::endl;
return 0;
}
/*
This code example produces the following output:
Month: 4
177 213 89 240 68 182 18 96 109 131 1 78
*/
See Also
- Class Object
- Namespace System
- Library Aspose.Slides