Hello! I am very confused about a Java program I need to do. We are forbidden from using arrays to store values, and I need to add multiple inputs from dialog boxes and average these numbers, but do not know how to go about this. Here is my code

Hello! I am very confused about a Java program I need to do. We are forbidden from using arrays to store values, and I need to add multiple inputs from dialog boxes and average these numbers, but do not know how to go about this. Here is my code, images may not be in order

if(surgeon.equals("Dr. Strange")) docStrange = docStrange + 1; if(operationType.equals("knee")) knee_Count = knee_Count + 1; if(operationType.equals("Hip")) hip_Count = hip_Count + 1; while(yes_no.equals("yes")) { patientName = JOptionPane.showInputDialog("What is the patients last name"); operation Type = JOptionPane.showInputDialog("Is the operation for a knee or a hip?"); insuranceFee = JOptionPane.showInputDialog("What is the insurance fee?"); surgeon = JOptionPane.showInputDialog("Which surgeon will be performing the operation?"); yes_no =JOptionPane.showInputDialog("Would you like to enter more data?"); if(surgeon.equals("Dr. Jones")) docJones = docJones + 1; if(surgeon.equals("Dr. Emmet Brown")) docEmmetBrown = docEmmetBrown + 1; if(surgeon.equals("Dr. Strange")) docStrange = docStrange + 1; if(operationType.equals("knee")) knee_Count = knee_Count + 1; if(operationType.equals("hip")) hip_Count = hip_Count + 1; } package aassignments; import javax.swing.JOptionPane; public class Assignment) { public static void main(String[] args) { String patientName = null; String operation Type = null; String insuranceFee = null; String surgeon = null; String yes_no; String response = null; int knee_Count = 0; int hip_Count = 0; int average: int docJones = 0; int docEmmetBrown = 0; int docStrange = 0; double sum = 0; int number = 0; patientName = JOptionPane.showInputDialog("What is the patients last name"); operation Type = JOptionPane.showInputDialog("Is the operation for a knee or a hip?"); insuranceFee = JOptionPane.showInputDialog("What is the insurance fee?"); surgeon = JOptionPane.showInputDialog("Which surgeon will be performing the operation?"); yes_no =JOptionPane.showInputDialog("Would you like to enter more data?"); if(surgeon.equals("Dr. Jones")) docJones = docJones + 1; if(surgeon.equals("Dr. Emmet Brown")) docEmmetBrown = docEmmetBrown + 1; if(surgeon.equals("Dr. Strange")) docStrange = docStrange + 1; if(surgeon.equals("Dr. Strange")) docStrange = docStrange + 1; if(operationType.equals("knee")) knee_Count = knee_Count + 1; if(operationType.equals("Hip")) hip_Count = hip_Count + 1; while(yes_no.equals("yes")) { patientName = JOptionPane.showInputDialog("What is the patients last name"); operation Type = JOptionPane.showInputDialog("Is the operation for a knee or a hip?"); insuranceFee = JOptionPane.showInputDialog("What is the insurance fee?"); surgeon = JOptionPane.showInputDialog("Which surgeon will be performing the operation?"); yes_no =JOptionPane.showInputDialog("Would you like to enter more data?"); if(surgeon.equals("Dr. Jones")) docJones = docJones + 1; if(surgeon.equals("Dr. Emmet Brown")) docEmmetBrown = docEmmetBrown + 1; if(surgeon.equals("Dr. Strange")) docStrange = docStrange + 1; if(operationType.equals("knee")) knee_Count = knee_Count + 1; if(operationType.equals("hip")) hip_Count = hip_Count + 1; } package aassignments; import javax.swing.JOptionPane; public class Assignment) { public static void main(String[] args) { String patientName = null; String operation Type = null; String insuranceFee = null; String surgeon = null; String yes_no; String response = null; int knee_Count = 0; int hip_Count = 0; int average: int docJones = 0; int docEmmetBrown = 0; int docStrange = 0; double sum = 0; int number = 0; patientName = JOptionPane.showInputDialog("What is the patients last name"); operation Type = JOptionPane.showInputDialog("Is the operation for a knee or a hip?"); insuranceFee = JOptionPane.showInputDialog("What is the insurance fee?"); surgeon = JOptionPane.showInputDialog("Which surgeon will be performing the operation?"); yes_no =JOptionPane.showInputDialog("Would you like to enter more data?"); if(surgeon.equals("Dr. Jones")) docJones = docJones + 1; if(surgeon.equals("Dr. Emmet Brown")) docEmmetBrown = docEmmetBrown + 1; if(surgeon.equals("Dr. Strange")) docStrange = docStrange + 1