🦄 refactor(C13, C14, C115): 更新了linux系统开发部分的结构

C14-文件系统/myenv.c

@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+extern char **environ;
+
+int main(int argc, char **argv)
+{
+
+    for (int i = 0; environ[i] != NULL; i++)
+        puts(environ[i]);
+
+    exit(0);
+}