generate_canonical Function template in C++
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:
// C++ program to illustrate generate_canonical()// function.#include <bits/stdc++.h>using namespace std; int main(){ // Obtain a root from the system clock: unsigned root = chrono::system_clock::now().time_since_epoch().count(); // Random number engine class // that generates pseudo-random numbers default_random_engine generator(root); double can_val = generate_canonical<double, numeric_limits<double>::digits>(generator); // Print the random canonical value // It will display different value everytime cout << "Random canonical value: " << can_val; return 0;} |
Output:
Random canonical value: 0.0281975
Reference: http://www.cplusplus.com/reference/random/generate_canonical/
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