How to Calculate How Many Times Inputs Entered in Sentinel Loop c++ - c++

Question

Here is the link to the programming question for detail. I have done my source code but I don't know how to calculate and display how many times inputs are entered in sentinel loop. Here is my source code:
#include <iostream>
using namespace std;
int main() {
int i, hours;
int tot_clients = 0;
float charges;
float tot_collection = 0;
const int sentinel = -1;
cout << "Welcome to ABC Parking Services Sdn Bhd" << endl;
cout << "=======================================" << endl;
while (hours != sentinel) {
cout << "Please enter number of parking hours (-1 to stop)" << endl;
cin >> hours;
if (hours <= 2 && hours > 0) {
charges = 1.00 * hours;
cout << "Charges: " << charges << endl;
}
else if (hours > 2 && hours <= 12) {
charges = (1.00 * 2) + ((hours - 2) * 0.50);
cout << "Charges: " << charges << endl;
}
else if (hours > 12) {
charges = 10.00 * hours;
cout << "Charges: " << charges << endl;
}
else if (hours == sentinel) {
break;
}
tot_collection = tot_collection + charges;
}
cout << "SUMMARY OF REPORT" << endl;
cout << "=======================================" << endl;
cout << "Total clients:" << tot_clients << endl;
cout << "Total colletion:" << tot_collection << endl;
return 0;
}
Hope someone can help me solving this. I am studying for my programming final exam.

Answer 1

I understand you want to count the number of clients (tot_clients). You have already intitalised the tot_clients = 0. This is good. You just have to increment the tot_clients variable inside the while loop (tot_clients++).
while (hours != sentinel)
{
cout << "Please enter number of parking hours (-1 to stop)" << endl;
cin >> hours;
tot_clients++; //this is the code to be added
/*rest of the code remains same*/

Answer 2

Add tot_clients++; just before or after tot_collection = tot_collection + charges;

Answer 3

1- initialize hours=0 otherwise hour will have some undetermined value during first-time condition check of while loop.
2-i am assuming that tot_clients stores total no. of customers than,
you just need to increment tot_clients on each iteration
#include <iostream>
using namespace std;
int main()
{
int i, hours=0;
int tot_clients=0;
float charges;
float tot_collection=0;
const int sentinel = -1;
cout << "Welcome to ABC Parking Services Sdn Bhd" << endl;
cout << "=======================================" << endl;
while (hours != sentinel)
{
cout << "Please enter number of parking hours (-1 to stop)" << endl;
cin >> hours;`
if (hours <= 2 && hours >0)
{
charges = 1.00 * hours;
cout << "Charges: " << charges << endl;
}
else if (hours>2 && hours <=12)
{
charges = (1.00*2) + ((hours - 2) * 0.50);
cout << "Charges: " << charges << endl;
}
else if (hours > 12)
{
charges = 10.00 * hours;
cout << "Charges: " << charges << endl;
}
else if (hours == sentinel)
{
break;
}
tot_collection = tot_collection + charges;
tot_clients=tot_clients+1; //increment's on each iteration except on input -1
}
cout << "SUMMARY OF REPORT" << endl;
cout << "=======================================" << endl;
cout << "Total clients:" << tot_clients << endl;
cout << "Total colletion:" << tot_collection << endl;
return 0;
}
`