C++ extensions to the use of C language constructs

Recently, when I studied C++, I learned that C has been extended in C++. When using the structure, I can specify private and public data types just like class 1, and also implement method Settings in struct.

To maintain the object-facing nature, however, it is recommended to use class to describe a class.

The case is as follows:

#include <iostream>
#include <ctime>
using namespace std ;
typedef struct student 
{
 private :
 int a , b , c ; 
 public :
 void set(int a , int b , int c)
 {
  this->a = a ; 
  this->b = b ; 
  this->c = c ; 
 }
 void prit()
 {
  cout << a << endl << b << endl << c << endl ;
 }
}stu;
stu st1 ; 
int main(void)
{
 st1.set(1,2,3);
 st1.prit(); 
 return 0 ;
}

Operation results:

1
2
3

conclusion