Thread: Help with loop

Can't figure out why my code won't retrieve more than the first input, in a loop.
This is what I have so far:

Code:

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



const int SENTINEL = -999;

int main()
{
    int studentNumber[100]; 
    string studentLastName[100]; 
    double studentGPA[100];
    int stuNum;
    string stuLName;
    double stuGPA, sum, average;
    
    cout << "Please enter a student number, -999 to end:";  
    cin >> stuNum;

          
           for(int counter = 99; counter >= 0; counter--) 
               {                                         
                    while (stuNum != -999)  
                    {
                    cout << "Enter last name: ";  
                    cin >> stuLName;
                    cout << "Enter Student GPA: ";
                    cin >> stuGPA;
                    
                    studentNumber[counter] = stuNum;  
                    studentLastName[counter] = stuLName;
                    studentGPA[counter] = stuGPA;
                    
                    counter++;
                    
                    cout << "Enter Student number, -999 to end: " ;
                    cin >> stuNum;
                    }
                    
                    cout << "The reverse is:";
                    cout << studentNumber[0] << " ";
                    cout << studentLastName[0] << " " << studentGPA[0];
                    
                    cin >> stuGPA; 
               }
               
                       
                   
               cout << endl;          
                    
return 0;
}

Your for loop takes counter down by one; the body of your for loop takes counter up by one. Net result: no change in counter.

How do you anticipate getting back inside the while loop, once you get out?