The Brooklyn College PACS, LLC vs Ogbonnayajrakpara, LLC

#include <iostream>
using namespace std;

class gradeRecord {
 private:
  string studentID;
  int units;
  int gradePoints;
  
 public:
  gradeRecord() {
   this->studentID;
   this->units;
   this->gradePoints;
  }
  
  void updateGradeInfo(int unitsValue, int gradeNum){
   units += unitsValue;
   gradepts += gradeNum;
 }
  
  int gpa() {
   return gpa;
  }
  
  void writeGradeInfo() {
   cout <<"What is your student id?" << endl;
   cin >> studentID;
   cout <<"What is the units?" << endl;
   cin >> units;
   cout <<"What is the grade points?" << endl;
   cin >> gradePoints;
   cout <<"What is your gpa?" << endl;
   cin >> gpa;
  }
  
  int main () {
   updateGradeInfo();
   gradeRecord();
   writeGradeInfo();
   gpa();
   
   return 0;
  }
};