在c ++中初始化扩展结构

Question

我在使用c ++初始化扩展结构时遇到了一些问题。

struct Struct1 {
  int property1;
}
struct Struct2: Struct1 {
  int property2;
}

int main() {
  Struct2 struct_var = { 1, 1 };
  std::cout << struct_var.property1;
}

如果有人能指出错误，我将不胜感激？

Answer 1

如果你在初始化程序中传递2 arguments，那么你需要拥有2 parameters的构造函数。像这样的东西

#include <iostream>

struct Struct1 {
    int property1;
};
struct Struct2 : Struct1 {
public:
    Struct2(int property1, int property2)
    {
        // Struct1::property1 = property1; // this will also work
        this->property1 = property1;
        this->property2 = property2;
    }
    int property2;
};
int main() {
    Struct2 struct_var = { 1, 1 };
    std::cout << struct_var.property1;
}