c++ - 类的构造函数的声明和定义并打印出私有(private)和公共(public)变量？

Question

我很难过，我现在正在学习 C++ 类(class)，这是我遇到的问题，我必须声明和定义构造函数，我不知道我在做什么错我试过但无法得到结果请帮助

 #include <iostream>
 using namespace std;

 class exercise
 {
 public:
      //declaration: constructor of class exercise
      int public_var;
      int get_private_var();
 private:
      int private_var;
  };

 //definition: constructor of class exercise
 int exercise::get_private_var()
 {
      return private_var;
 }

 int main()
 {
      exercise object(2,3);
      int pub_var = object.public_var;
      int pri_var = object.get_private_var();
      cout << pub_var <<' '<<pri_var<<endl;
      return 0;
 }

Answer 1

示例构造函数是:

class exercise
{
public:
  exercise(int,int);
  int public_var;
  int get_private_var();
private:
  int private_var;
};

//Constructor definition
exercise::exercise(int a, int b)
{
  public_var = a;
  private_var = b
}
//rest of member functions