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_constant_distribution 14 15 // template<class InputIterator> 16 // piecewise_constant_distribution(InputIteratorB firstB, 17 // InputIteratorB lastB, 18 // InputIteratorW firstW); 19 20 #include <random> 21 #include <cassert> 22 23 int main() 24 { 25 { 26 typedef std::piecewise_constant_distribution<> D; 27 double b[] = {10}; 28 double p[] = {12}; 29 D d(b, b, p); 30 std::vector<double> iv = d.intervals(); 31 assert(iv.size() == 2); 32 assert(iv[0] == 0); 33 assert(iv[1] == 1); 34 std::vector<double> dn = d.densities(); 35 assert(dn.size() == 1); 36 assert(dn[0] == 1); 37 } 38 { 39 typedef std::piecewise_constant_distribution<> D; 40 double b[] = {10}; 41 double p[] = {12}; 42 D d(b, b+1, p); 43 std::vector<double> iv = d.intervals(); 44 assert(iv.size() == 2); 45 assert(iv[0] == 0); 46 assert(iv[1] == 1); 47 std::vector<double> dn = d.densities(); 48 assert(dn.size() == 1); 49 assert(dn[0] == 1); 50 } 51 { 52 typedef std::piecewise_constant_distribution<> D; 53 double b[] = {10, 15}; 54 double p[] = {12}; 55 D d(b, b+2, p); 56 std::vector<double> iv = d.intervals(); 57 assert(iv.size() == 2); 58 assert(iv[0] == 10); 59 assert(iv[1] == 15); 60 std::vector<double> dn = d.densities(); 61 assert(dn.size() == 1); 62 assert(dn[0] == 1/5.); 63 } 64 { 65 typedef std::piecewise_constant_distribution<> D; 66 double b[] = {10, 15, 16}; 67 double p[] = {.25, .75}; 68 D d(b, b+3, p); 69 std::vector<double> iv = d.intervals(); 70 assert(iv.size() == 3); 71 assert(iv[0] == 10); 72 assert(iv[1] == 15); 73 assert(iv[2] == 16); 74 std::vector<double> dn = d.densities(); 75 assert(dn.size() == 2); 76 assert(dn[0] == .25/5.); 77 assert(dn[1] == .75); 78 } 79 { 80 typedef std::piecewise_constant_distribution<> D; 81 double b[] = {10, 14, 16, 17}; 82 double p[] = {25, 62.5, 12.5}; 83 D d(b, b+4, p); 84 std::vector<double> iv = d.intervals(); 85 assert(iv.size() == 4); 86 assert(iv[0] == 10); 87 assert(iv[1] == 14); 88 assert(iv[2] == 16); 89 assert(iv[3] == 17); 90 std::vector<double> dn = d.densities(); 91 assert(dn.size() == 3); 92 assert(dn[0] == .0625); 93 assert(dn[1] == .3125); 94 assert(dn[2] == .125); 95 } 96 } 97
