Getting the Max Age of a student using Class C++

Please, help me and check my program:i want to use the maxAge() member function to get the max age entered from the function MAIN using the while loops which i stored into the object students.Main.cpp, Age.h and Age.cpp included.

Practice.cpp

#include<iostream>
using namespace std;
#include<string>
#include "Age.h"

     int main (){
        Age students;
        int age;
        int sum=0;
        int max =0;
        int min =0;
        do{ cout << "Enter the age of the students here " << endl;
        cin >> age;
        students.setAge(age);
        sum=sum+students.getAge();
        if(students.getAge()>max){
            //max= students.mAge(); **this is working but i don,t wanna use it.**

        }
        max = students.maxAge(students);
        }while(age!=0);

    cout << "The total age of the students are " << sum << endl;
    students.ageAverage(sum);
    cout << " The biggest Age in the roll is " << max << endl;


    system("pause");
         return 0; 

     }

Age.h

#include<iostream>
#include<string>
using namespace std;

class Age
{
private :
    int  age;
public:
    Age(void);
    void setAge(int age);
    int  getAge();
    void ageAverage(int sum);
    int maxAge(Age object);
    int minAge(Age object);


};

Age.cpp

#include<iostream>
#include<string>
#include "Age.h"

Age::Age(void) {
}
void Age::setAge(int age){
      this->age=age;
    }
int  Age::getAge(){
 return age;
    }
void Age::ageAverage(int sum){
  int average;
  average=sum/2;
 cout << "The Average Age is " << average << endl;
}
int Age::maxAge(Age object){
    int max=0;
    do{
        if(object.getAge()>max){
        max=object.getAge();
    }
    }while(object.getAge()!=0);
 return max;
}

Thanks