public member function
<random>
| (1) | explicit uniform_real_distribution ( result_type a = 0.0, result_type b = 1.0 ); |
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| (2) | explicit uniform_real_distribution ( const param_type& parm ); |
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Construct uniform real distribution
Constructs a uniform_real_distribution object, adopting the distribution parameters specified either by a and b or by object parm.
Parameters
- a, b
- Upper and lower bounds of the range ([a,b)) of possible values the distribution can generate.
Note that the range includes a but not b.
b shall be greater than or equal to a (a<=b).
result_type is a member type that represents the type of the random numbers generated on each call to operator(). It is defined as an alias of the first class template parameter (RealType).
- parm
- An object representing the distribution's parameters, obtained by a call to member function param.
param_type is a member type.
Example
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// uniform_real_distribution example
#include <iostream>
#include <chrono>
#include <random>
int main()
{
// construct a trivial random generator engine from a time-based seed:
unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
std::default_random_engine generator (seed);
std::uniform_real_distribution<double> distribution (0.0,1.0);
std::cout << "some random numbers between 0.0 and 1.0: " << std::endl;
for (int i=0; i<10; ++i)
std::cout << distribution(generator) << std::endl;
return 0;
}
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Possible output:
some random numbers between 0.0 and 1.0:
0.423157
0.653959
0.26444
0.280517
0.884283
0.915755
0.419503
0.353592
0.0285182
0.15477
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