Help w/ code

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

int main(){
    //Initialize Required Variables For Program
    int patientCount = 0;
    string id;
    int avg = 0;
    int howMany = 0;
    ifstream reader ("data.txt"); //Open The Data File To Be Read From

    while( reader >> id && reader >> howMany ){ //as long as you can read another pacient data
        int sum = 0; //sum accumulates the pressure readings per pacient
        cout << "The Patient ID Is: " << id << endl;
        cout << "The Number Of Blood Pressure Record This Patient Has Is: " << howMany << endl;
        for(int K = 0; K < howMany; ++K){
            int number;
            reader >> number;
            sum += number;

        }
        //compute the average here

    }
    system("pause");
    return 0;
}