1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <random> 11 12 // template<class RealType = double> 13 // class piecewise_linear_distribution 14 15 // template<class UnaryOperation> 16 // piecewise_linear_distribution(size_t nw, result_type xmin, 17 // result_type xmax, UnaryOperation fw); 18 19 #include <iostream> 20 21 #include <random> 22 #include <cassert> 23 24 double fw(double x) 25 { 26 return 2*x; 27 } 28 29 int main() 30 { 31 { 32 typedef std::piecewise_linear_distribution<> D; 33 D d(0, 0, 1, fw); 34 std::vector<double> iv = d.intervals(); 35 assert(iv.size() == 2); 36 assert(iv[0] == 0); 37 assert(iv[1] == 1); 38 std::vector<double> dn = d.densities(); 39 assert(dn.size() == 2); 40 assert(dn[0] == 0); 41 assert(dn[1] == 2); 42 } 43 { 44 typedef std::piecewise_linear_distribution<> D; 45 D d(1, 10, 12, fw); 46 std::vector<double> iv = d.intervals(); 47 assert(iv.size() == 2); 48 assert(iv[0] == 10); 49 assert(iv[1] == 12); 50 std::vector<double> dn = d.densities(); 51 assert(dn.size() == 2); 52 assert(dn[0] == 20./44); 53 assert(dn[1] == 24./44); 54 } 55 { 56 typedef std::piecewise_linear_distribution<> D; 57 D d(2, 6, 14, fw); 58 std::vector<double> iv = d.intervals(); 59 assert(iv.size() == 3); 60 assert(iv[0] == 6); 61 assert(iv[1] == 10); 62 assert(iv[2] == 14); 63 std::vector<double> dn = d.densities(); 64 assert(dn.size() == 3); 65 assert(dn[0] == 0.075); 66 assert(dn[1] == 0.125); 67 assert(dn[2] == 0.175); 68 } 69 } 70
