新建了策略工厂类

include/StrategyFactory.h

@@ -0,0 +1,22 @@
+//
+// Created by ricardo on 2022/6/27.
+//
+
+#ifndef AUTO_BUS_GUI_STRATEGY_FACTORY_H
+#define AUTO_BUS_GUI_STRATEGY_FACTORY_H
+#include "cstdio"
+#include "QByteArray"
+
+#include "BusStrategyBase.h"
+#include "BusFCFSStrategy.h"
+#include "BusSSTFStrategy.h"
+#include "BusSCANStrategy.h"
+
+class StrategyFactory
+{
+public:
+    static BusStrategyBase *GetStrategy(const QString& file_name);
+};
+
+
+#endif //AUTO_BUS_GUI_STRATEGY_FACTORY_H

include/railsModel.h

@@ -45,6 +45,8 @@ public:
      */
     int node_num;
 
+    int total_distance;
+
     explicit RailsModel();
 
     ~RailsModel();

src/StrategyFactory.cpp

@@ -0,0 +1,144 @@
+//
+// Created by ricardo on 2022/6/27.
+//
+
+#include "StrategyFactory.h"
+
+BusStrategyBase *StrategyFactory::GetStrategy(const QString& file_name)
+{
+    QByteArray bytes = file_name.toLatin1();
+
+    FILE *config_file = NULL;
+    char buffer[30];
+    int total_station = 0;
+    int distance = 0;
+    int chosen_strategy = 0;
+
+    fopen_s(&config_file, bytes.data(), "r");
+
+    // 循环读取文件的每一行
+    while (fgets(buffer, sizeof buffer, config_file) != NULL)
+    {
+        char first_char = buffer[0];
+        char *p;
+
+        switch (first_char)
+        {
+            case '#':
+                // 如果读取到#什么都不做
+                break;
+            case 'T':
+                // TOTAL_STATION
+                p = buffer;
+
+                // 把数字前面的所有字符全部干掉
+                while (*p < '0' || *p > '9')
+                {
+                    p++;
+                }
+
+                // 讲道理，应该只有两位数，所以就这样处理了
+                if (*(p + 1) == '\n' || *(p + 1) == '\0')
+                {
+                    total_station = *p - 48;
+                }
+                else
+                {
+                    total_station = (*p - 48) * 10 + *(p + 1) - 48;
+                }
+
+                break;
+            case 'S':
+                // STRATEGY
+                p = buffer;
+
+                // 将=前的字符全部略去
+                while (*p != '=')
+                {
+                    p++;
+                }
+                // =也去掉
+                p++;
+                // =和策略之间的空格也去掉
+                while (*p == ' ')
+                {
+                    p++;
+                }
+
+                if (*p == 'F' && *(p + 1) == 'C') //FCFS
+                {
+                    chosen_strategy = BUS_FCFS;
+                }
+                else if (*p == 'S' && *(p + 1) == 'S') //SSTF
+                {
+                    chosen_strategy = BUS_SSTF;
+                }
+                else if (*p == 'S' && *(p + 1) == 'C') //SCAN
+                {
+                    chosen_strategy = BUS_SCAN;
+                }
+                else
+                {
+                    // 读取失败
+                    chosen_strategy = -1;
+                }
+
+                break;
+            case 'D':
+                // DISTANCE
+                p = buffer;
+
+                // 把数字前面的所有字符全部干掉
+                while (*p < '0' || *p > '9')
+                {
+                    p++;
+                }
+
+                if (*(p + 1) == '\n' || *(p + 1) == '\0')
+                {
+                    distance = *p - 48;
+                }
+
+                break;
+            default:
+                continue;
+        }
+    }
+
+    // 处理参数去缺省值的情况
+    if (distance == 0)
+    {
+        distance = 2;
+    }
+    if (total_station == 0)
+    {
+        total_station = 5;
+    }
+    if(chosen_strategy == -1)
+    {
+        chosen_strategy = BUS_FCFS;
+    }
+
+    BusStrategyBase *controller;
+
+    switch (chosen_strategy)
+    {
+        case BUS_FCFS:
+            controller = new BusFCFSStrategy;
+            break;
+        case BUS_SSTF:
+            controller = new BusSSTFStrategy;
+            break;
+        case BUS_SCAN:
+            controller = new BusSCANStrategy;
+        default:
+            controller = nullptr;
+            break;
+    }
+
+    if(controller != nullptr)
+    {
+        controller->rails_model->CreateRails(distance, total_station);
+    }
+    return controller;
+}

src/railsModel.cpp

@@ -8,6 +8,7 @@ RailsModel::RailsModel()
 {
     rails = nullptr;
     node_num = 0;
+    total_distance = 0;
 }
 
 RailsModel::~RailsModel()
@@ -76,6 +77,7 @@ void RailsModel::CreateRails(int distance, int node_number)
 
     rails = head;
     node_num = node_number;
+    total_distance = node_number * distance;
 }
 
 void RailsModel::FreeRails()