sheet09+prob

1

@@ -1,5 +0,0 @@
-00000
-01110
-00000
-00000
-

Makefile

@@ -65,3 +65,8 @@ pizza:
 	$(CC) src/pizza.cpp -o build/pizza
 	chmod +x build/pizza
 	build/pizza
+
+probability:
+	$(CC) src/probability.cpp -o build/probability
+	chmod +x build/probability
+	build/probability

src/HTable.cpp

@@ -69,17 +69,23 @@ class HTable
 		friend std::ostream& operator<<(std::ostream &os, const HTable &h)
 		{
 			os << '{';
-			for(auto &pair : h.data)
+			for(auto pair = h.data.cbegin(); pair != h.data.cend(); ++pair)
 			{
 				os << "(\"";
-				os << pair.first;
+				os << pair[0].first;
 				os << "\": ";
-				os << pair.second;
-				if(std::distance(pair, *h.data.end())==1)
-				{ os << ")}"; }
-				else
-				{ os << "), "; }
+				os << pair[0].second;
+
+				if(pair == h.data.cend()-1)
+				{
+					os << ")";
 				}
+				else
+				{
+					os << "), ";
+				}
+			}
+			os << '}';
 			return os;
 		}
 
@@ -100,28 +106,35 @@ class HTable
 					position = 0;
 				}
 			}
-			throw std::runtime_error("Could not find key!");
+		}
+
+		void clear()
+		{
+			for(size_t i=0; i<data.size(); ++i)
+			{
+				positions_in_use[i] = false;
+				data[i] = std::pair<std::string, T>();
+			}
 		}
 };
 
 int main()
 {
 	HTable<size_t> t1(5);
-
 	std::cout << t1 << '\n';
 
 	for(size_t i=0; i<5;++i)
 	{
 		t1.insert(std::to_string(i), i);
 	}
-
 	std::cout << t1 << '\n';
 
 	t1.insert("1", 10);
-
 	std::cout << t1 << '\n';
 
-	t1.erase("1");
+	t1.erase("4");
+	std::cout << t1 << '\n';
 
+	t1.clear();
 	std::cout << t1 << '\n';
 }

src/probability.cpp

@@ -0,0 +1,35 @@
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <iostream>
+#include <ctime>
+
+constexpr size_t TRIALS_AMOUNT = 1000000;
+
+int main()
+{
+	size_t monday_heads = 0;
+	size_t monday_tails = 0;
+	size_t tuesday_tails = 0;
+	std::srand(std::time(nullptr));
+	for(std::size_t i=0; i<TRIALS_AMOUNT;++i)
+	{
+		if(std::rand()%2)
+		{
+			++monday_heads;
+		}
+		else {
+			if(std::rand()%2)
+			{
+				++monday_tails;
+			}
+			else
+			{
+				++tuesday_tails;
+			}
+		}
+	}
+	std::printf("Monday Heads: %zu (%f%%)\n", monday_heads, monday_heads*100.0/TRIALS_AMOUNT);
+	std::printf("Monday Tails: %zu (%f%%)\n", monday_tails, monday_tails*100.0/TRIALS_AMOUNT);
+	std::printf("Tuesday Tails: %zu (%f%%)\n", tuesday_tails, tuesday_tails*100.0/TRIALS_AMOUNT);
+}