#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"); };
};

typedef struct Base1 {
  int v1;
  //    private:   //error!
  int v3;

public: // 显示声明public
  int v2;
  void print() { printf("%s\n", "hello world"); };
} B;
void Base() { printf("%s\n", "I am Base func"); }
// void B() {}  //error! 符号 "B" 已经被定义为一个 "struct Base1" 的别名
int main() {
  struct Base base; // ok
  // Base base1;  // error!
  base.v1 = 1;
  base.v3 = 2;
  base.print();
  printf("%d\n", base.v1);
  printf("%d\n", base.v3);
  Base();
  return 0;
}