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 IntType = int> 13 // class discrete_distribution 14 15 // template<class InputIterator> 16 // discrete_distribution(InputIterator firstW, InputIterator lastW); 17 18 #include <random> 19 #include <cassert> 20 21 int main() 22 { 23 { 24 typedef std::discrete_distribution<> D; 25 double p0[] = {1}; 26 D d(p0, p0); 27 std::vector<double> p = d.probabilities(); 28 assert(p.size() == 1); 29 assert(p[0] == 1); 30 } 31 { 32 typedef std::discrete_distribution<> D; 33 double p0[] = {10}; 34 D d(p0, p0+1); 35 std::vector<double> p = d.probabilities(); 36 assert(p.size() == 1); 37 assert(p[0] == 1); 38 } 39 { 40 typedef std::discrete_distribution<> D; 41 double p0[] = {10, 30}; 42 D d(p0, p0+2); 43 std::vector<double> p = d.probabilities(); 44 assert(p.size() == 2); 45 assert(p[0] == 0.25); 46 assert(p[1] == 0.75); 47 } 48 { 49 typedef std::discrete_distribution<> D; 50 double p0[] = {30, 10}; 51 D d(p0, p0+2); 52 std::vector<double> p = d.probabilities(); 53 assert(p.size() == 2); 54 assert(p[0] == 0.75); 55 assert(p[1] == 0.25); 56 } 57 { 58 typedef std::discrete_distribution<> D; 59 double p0[] = {30, 0, 10}; 60 D d(p0, p0+3); 61 std::vector<double> p = d.probabilities(); 62 assert(p.size() == 3); 63 assert(p[0] == 0.75); 64 assert(p[1] == 0); 65 assert(p[2] == 0.25); 66 } 67 { 68 typedef std::discrete_distribution<> D; 69 double p0[] = {0, 30, 10}; 70 D d(p0, p0+3); 71 std::vector<double> p = d.probabilities(); 72 assert(p.size() == 3); 73 assert(p[0] == 0); 74 assert(p[1] == 0.75); 75 assert(p[2] == 0.25); 76 } 77 { 78 typedef std::discrete_distribution<> D; 79 double p0[] = {0, 0, 10}; 80 D d(p0, p0+3); 81 std::vector<double> p = d.probabilities(); 82 assert(p.size() == 3); 83 assert(p[0] == 0); 84 assert(p[1] == 0); 85 assert(p[2] == 1); 86 } 87 } 88
