add setup loading from file

.gitignore

@@ -10,5 +10,8 @@
 # Include all h file under all folder
 !**/*.h
 
+# Include all configure file under all folder
+!**/*.conf
+
 # Include .gitignore itself
 !.gitignore

04.HandsOn/common/Constant.cpp

+#include <iostream>
+#include <fstream>
+#include <map>
+#include "Constant.h"
+
+using namespace std;
+
+map<string, string> loadSetup(string setupFileName) {
+
+    // 定义文件流，用于打开文件
+    fstream fs;
+    fs.open(setupFileName, ios::in);
+    // 定义变量，用于存放行
+    string line;
+
+    // 定义map
+    map<string, string> mapSetup;
+
+    // 逐行读取
+    if (!fs) {
+
+        cout << "Cannot open file.\n";
+        return mapSetup;
+
+    } else {
+
+        // 逐行读取
+        while (getline(fs, line)) {
+
+            // 移除空格
+            line.erase(std::remove(line.begin(), line.end(), ' '), line.end());
+
+            // 是否以#开头
+            if (line[0] == '#') {
+                continue;
+            }
+
+            // 定义分隔符
+            char delimiter = '=';
+            // 取分隔符的位置
+            size_t pos = line.find(delimiter);
+            // 如果分隔符找不到
+            if (pos == string::npos) {
+                cout << "Not found!" << endl;
+                return mapSetup;
+            }
+
+            // 取key
+            string key = line.substr(0, pos);
+
+            // 取value
+            string value = line.substr(pos + 1);
+
+            mapSetup.insert(std::pair<string, string>(key, value));
+
+        }
+
+    }
+
+    return mapSetup;
+
+};
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04.HandsOn/common/Constant.h

+#pragma once // 防止头文件被重复包含
+
+#include <iostream>
+#include <map>
+
+using namespace std;
+
+static string SETUP_FILE_NAME = "common/Setup.conf";
+static string RESOLUTION_WIDTH = "resolution_width";
+static string RESOLUTION_HEIGHT = "resolution_height";
+
+map<string, string> loadSetup(string setupFileName);
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04.HandsOn/common/Setup.conf

+#This is setup file
+resolution_width = 1920
+resolution_height = 1080
+mode = 1
+multiuser_allowed = false
\ No newline at end of file

04.HandsOn/common/Setup.cpp

 #include <iostream>
 #include "Setup.h"
+#include "Constant.h"
 
 using namespace std;
 
+map<string, string> setup();
+
+// 构造函数
+Setup::Setup(string setupFileName) {
+
+    this->mapSetup = loadSetup(setupFileName);
+
+    this->setResolution();
+
+};
+
+// 打印所有设定项
+void Setup::printSetup() {
+
+    cout << "----- Print all setup -----" << endl;
+
+    for (auto & x: this->mapSetup) {
+
+        std::cout << "[" << x.first << "]:[" << x.second << "]" << endl;
+
+    }
+
+};
+
 // 设定分辨率
 void Setup::setResolution() {
 
-    this->resolution_width = 1920;  // 从设定处取得
-    this->resolution_height = 1080; // 从设定处取得
+    this->resolution_width = stoi(mapSetup.at(RESOLUTION_WIDTH)); // 从设定处取得
+    this->resolution_height = stoi(mapSetup.at(RESOLUTION_HEIGHT)); // 从设定处取得
 
 };
 

04.HandsOn/common/Setup.h

 #pragma once // 防止头文件被重复包含
 
 #include <iostream>
+#include <map>
 
 using namespace std;
 
@@ -13,9 +14,17 @@ class Setup {
         int resolution_width;
         // 垂直分辨率
         int resolution_height;
+        // 定义存放设定值的map
+        map<string, string> mapSetup;
     
     public:
 
+        // 构造函数
+        Setup(string setupFileName);
+
+        // 打印所有设定项
+        void printSetup();
+
         // 设定分辨率
         void setResolution();
 

04.HandsOn/main.cpp

 #include <iostream>
 #include "common/Setup.h"
+#include "common/Constant.h"
 
 int main() {
 
-    Setup s;
-    s.setResolution();
+    // 读取文件，装载设定项
+    Setup s(SETUP_FILE_NAME);
+    // 打印所有装载的设定项
+    s.printSetup();
+    // 打印分辨率设定
+    cout << "----- Resolution setup -----" << endl;
     cout << "Resolution: "<< s.getResolution() << endl;
 
 }
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