[C/C++] Example / Pointer of Structure

//
//  main.cpp
//

#include <iostream>
#include <string>

using namespace std;

struct Student {
    int n;
    string name;
    int eng;
    int math;
};

int main( int argc , const char * argv [])
{
    Student choi;
    Student *sp = NULL;
    sp = &choi;
   
   
    choi.n = 15;
    choi.name = "geol";
    choi.eng = 100;
    choi.math = 99;
   
    cout << sp->n << endl;
    cout << sp->name << endl;
    cout << sp->eng << endl;
    cout << sp->math << endl;
   
    return 0 ;
}