[C++] C++构造函数基础

#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main(void)
{
  //构造函数
  struct block
  {
    block(void) = default;
    block(int data_1, int data_2) : data_1(data_1), data_2(data_2) {}
    int data_1;
    int data_2;
    void show(void)
    {
      cout << this->data_1 << "  " << this->data_2 << endl;
    }
  };
  //定义一个类对象
  struct block aclass(1, 2);
  aclass.show();
  return 0;
}