Ticket Office (Pro) - What am I doing wrong?

Question

You are working on a ticketing system. A ticket costs $10.
The office is running a discount campaign: each group of 5 people is getting a discount, which is determined by the age of the youngest person in the group.
You need to create a program that takes the ages of all 5 people as input and outputs the total price of the tickets.

Sample Input:
55
28
15
38
63

Sample Output:
42.5

The youngest age is 15, so the group gets a 15% discount from the total price, which is $50 - 15% = $42.5
The given code is declaring an array of 5 elements and taking them from input using a loop.

#include <iostream>
using namespace std;

int main() {
int ages[5];

for (int i = 0; i < 5; ++i) {
cin >> ages[i];
}
//your code goes here
double ticketPrice = 10;
double totalCost;
double discount;

int sizeofGroup = sizeof(ages) / sizeof(ages[0]);
totalCost = sizeofGroup * ticketPrice;
// cout << totalCost << endl;

for (int i = 0; i < ages[i]; ++i) {
discount = ages[0];
if (ages[i] < discount) {
discount = ages[i];
}
}

cout << discount << endl; // Here to see the value of "discount"

cout << totalCost - (totalCost * discount / 100);

return 0;
}

Test Case 2

Input
69
48
33
25
29

Your Output
29
35.5
Expected Output
37.5

Answer 1

In your *for* loop

for (int i = 0; i < ages[i]; ++i) {
discount = ages[0];
if (ages[i] < discount) {
discount = ages[i];
}
}

1) your loop will go beyond the size of the array leading to undefined behaviour

2) *discounts* is reset to ages[0] in the begining or every iteration

Here is the fix👇
https://code.sololearn.com/czwfLueDzMPO/?ref=app

Answer 2

discount = ages[0]; // not in a loop

for (int i = 0; i < 5; i++) {

if (ages[i] < discount) {
discount = ages[i];
}
}

Answer 3

@Max thanks for the answer.
@Arsenic thank you for the explanation.