generate_canonical Function template in C++
Last Updated :
11 Sep, 2018
This template in C++ is used to convert the value generated by g into a floating point value in the range [0, 1) preserving the uniformity properties of sequences generated with g. To generate enough entropy
generate_canonical() will call g() exactly ‘k’ times where,
Syntax:
template ( class RealType, size_t bits, class URNG )
RealType generate_canonical (URNG& g);
Template parameters: This template accepts three parameters as mentioned above and described below:
- RealType: The function returns a value of floating point type.
- bits: Maximum number of bits in the mantissa.
- URNG: A uniform random number generator class.
Parameters: The generate_canonical() function accepts single parameter
g which is used as uniform random number generator object. It is used to acquire entropy.
Return value: This function returns a floating point value in range [0, 1).
Below programs illustrate the above C++ template
Program:
#include <bits/stdc++.h>
using namespace std;
int main()
{
unsigned root = chrono::system_clock::now().time_since_epoch().count();
default_random_engine generator(root);
double can_val = generate_canonical< double ,
numeric_limits< double >::digits>(generator);
cout << "Random canonical value: " << can_val;
return 0;
}
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Output:
Random canonical value: 0.0281975
Reference: http://www.cplusplus.com/reference/random/generate_canonical/
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