update dir

struct/struct_func.cpp

@@ -0,0 +1,25 @@
+#include<iostream>
+#include<stdio.h>
+
+struct Base {         
+    int v1;
+//    private:   //error!
+        int v3;
+    public:     //显示声明public
+        int v2;
+    void print(){       
+        printf("%s\n","hello world");
+    };    
+};
+
+int main() {
+    struct Base base1;  //ok
+    Base base2; //ok
+    Base base;
+    base.v1=1;
+    base.v3=2;
+    base.print();
+    printf("%d\n",base.v1);
+    printf("%d\n",base.v3);
+    return 0;
+}