commited main.cpp

main.cpp

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+#include <iostream>
+#include <string>
+#include <ctime>
+#include <stdlib.h>
+#include <math.h>
+#include <limits>
+#include <iomanip>
+
+
+using namespace std;
+
+struct resultAbs
+{
+    int wins;
+    int loses;
+    int ties;
+};
+
+struct gameStat
+{
+    int wins;
+    int loses;
+};
+
+float probability(float teamProb, float sideProb, float momProb)
+{
+    return ((teamProb*sideProb*momProb)/(teamProb*sideProb + teamProb*momProb + sideProb*momProb - teamProb - sideProb - momProb + 1));
+}
+
+float getRandom(float a, float b)
+{
+    return ((b-a)*((float)rand()/RAND_MAX))+a;
+}
+
+gameStat game(float teamProb, float sideProb, float pistolProb, float momentum, int showGames, int tries)
+{
+    gameStat result;
+    result.loses = 0;
+    result.wins = 0;
+    string teamA = "Team A: ";
+    string teamB = "Team B: ";
+    int i;
+    float sideProbAll;
+    float momentumProb = 0.5;
+    float winProb;
+    bool wonLast = true;
+    for (i=1; i<=30&&(result.wins<16)&&(result.loses<16); i++)
+    {
+        if (i==1 || i==16)
+        {
+            sideProbAll = pistolProb;
+            momentumProb = 0.5;
+            if (showGames <= 100)
+            {
+                teamA = teamA + "|";
+                teamB = teamB + "|";
+            }
+        } else
+        {
+            sideProbAll = sideProb;
+            if (wonLast==true)
+            {
+                momentumProb = momentum;
+            } else
+            {
+                momentumProb = 1-momentum;
+            }
+        }
+        if (i<=15)
+        {
+            winProb = probability(teamProb, sideProbAll, momentumProb);
+        } else
+        {
+            winProb = probability(teamProb, 1-sideProbAll, momentumProb);
+        }
+        if(getRandom(0, 1) <= winProb)
+        {
+            result.wins++;
+            wonLast = true;
+            if (showGames <= 100)
+            {
+                teamA = teamA + "X";
+                teamB = teamB + "_";
+            }
+        }
+        else
+        {
+            result.loses++;
+            wonLast = false;
+            if (showGames <= 100)
+            {
+                teamA = teamA + "_";
+                teamB = teamB + "X";
+            }
+        }
+    }
+    if (showGames <= 50)
+    {
+        teamA = teamA + "|";
+        teamB = teamB + "|";
+        cout << endl << "Game " << showGames << ": " << result.wins << ":" << result.loses << endl << teamA << endl << teamB << endl;
+    } else if (showGames == 51)
+    {
+        cout << endl << "Game 51-" << tries <<":" << endl << "[not shown to speed up the simulation]" << endl;
+        cout << endl << "Simulation progress ('Ctrl + Pause/Break' to force stop):" << endl << "==================================================" << endl;
+    }
+    return result;
+}
+
+int main()
+{
+    float teamProb;
+    float sideProb;
+    float momentum;
+    float pistolProb;
+    int tries;
+    int i;
+    gameStat onegame;
+    resultAbs simulation;
+    srand (time(NULL));
+    do
+    {
+        simulation.wins = 0;
+        simulation.loses = 0;
+        simulation.ties = 0;
+        cout << "Enter the number of games to simulate (1..2147483647), 0 to quit: ";
+        cin >> tries;
+        if (tries==0)
+            break;
+        cout << "Enter the probability of Team A winning rounds with their skill (0..1): ";
+        cin >> teamProb;
+        cout << "Enter the probability of team winning rounds on the side Team A started given the map imbalance (0..1): ";
+        cin >> sideProb;
+        cout << "Enter the probability of Team A winning pistol rounds (0..1): ";
+        cin >> pistolProb;
+        cout << "Enter the probability of a team winning the next round given they won the previous round (momentum) (0..1): ";
+        cin >> momentum;
+        for (i=1; i<=tries;i++)
+        {
+            onegame = game(teamProb, sideProb, pistolProb, momentum, i, tries);
+            if (onegame.wins < onegame.loses)
+            {
+                simulation.loses++;
+            }
+            else if (onegame.loses < onegame.wins)
+            {
+                simulation.wins++;
+            }
+            else
+            {
+                simulation.ties++;
+            }
+            if (i%(tries/50) == 0)
+                cout << "*";
+        }
+        cout << endl << "\nTeam A wins:  " << setprecision(4) << (float)simulation.wins*100/(float)tries << "% (" << simulation.wins << ")\nTies:         " << (float)simulation.ties*100/(float)tries << "% (" << simulation.ties << ")\nTeam A loses: " << (float)simulation.loses*100/(float)tries << "% (" << simulation.loses << ")\n\n";
+    } while (tries != 0);
+    return 0;
+}
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