初始提交：龙芯2K0300智能车卖家Demo完整代码

src/global.cpp

@@ -0,0 +1,37 @@
+#include "global.h"
+
+double target_speed;
+
+// 从文件读取双精度值
+double readDoubleFromFile(const std::string &filename)
+{
+    std::ifstream file(filename);
+    double value = 0.0;
+    if (file.is_open())
+    {
+        file >> value; // 读取文件中的值
+        file.close();
+    }
+    else
+    {
+        std::cerr << "Failed to open " << filename << std::endl;
+    }
+    return value;
+}
+
+// 从文件中读取标志
+bool readFlag(const std::string &filename)
+{
+    std::ifstream file(filename);
+    int flag = 0;
+    if (file.is_open())
+    {
+        file >> flag; // 读取文件中的更新标志
+        file.close();
+    }
+    else
+    {
+        std::cerr << "Failed to open " << filename << std::endl;
+    }
+    return flag;
+}