Ex3.Packets

#include <iostream>

using namespace std;

const int SIZE = 100;

struct Packet
{
    string msg;
    int num;
    double losses;
};

void readPacket(Packet& p);
void readPacketsArr(Packet parr[], int n);
void filterPackets(Packet parr[], int& n);
void swapPackets(Packet& p1, Packet& p2);
void packetsSort(Packet parr[], int n);
void printMsg(const Packet parr[], int n);

int main()
{
    int n;
    Packet pck[SIZE];
    do
    {
        cout << "Enter packet count [5-100]: ";
        cin >> n;
    }
    while (n < 5 || n > 100);

    readPacketsArr(pck, n);

    filterPackets(pck, n);

    packetsSort(pck, n);

    cout << "Message: " << endl;
    printMsg(pck, n);

    return 0;
}

void readPacket(Packet& p)
{
    cout << "Read message: ";
    cin.ignore();
    getline(cin, p.msg);
    cout << "Enter packet number: ";
    cin >> p.num;
    do
    {
        cout << "Enter packet losses (0 - 1): ";
        cin >> p.losses;
    }
    while (p.losses < 0.0 || p.losses > 1.0);
}

void readPacketsArr(Packet parr[], int n)
{
    for (int i = 0; i < n; i++)
    {
        readPacket(parr[i]);
    }
}

void filterPackets(Packet parr[], int& n)
{
    int j = 0;
    for (int i = 0; i < n; i++)
    {
        if (parr[i].losses < 0.51)
        {
            parr[j] = parr[i];
            j++;
        }
    }
    n = j;
}

void swapPackets(Packet& p1, Packet& p2)
{
    Packet temp = p1;
    p1 = p2;
    p2 = temp;
}

void packetsSort(Packet parr[], int n)
{
    int min_idx;
    for (int i = 0; i < n-1; i++)
    {
        min_idx = i;
        for (int j = i + 1; j < n; j++)
        {
            if (parr[j].num < parr[min_idx].num)
            {
                min_idx = j;
            }
        }
        swapPackets(parr[min_idx], parr[i]);
    }
}

void printMsg(const Packet parr[], int n)
{
    cout << parr[0].msg;
    for (int i = 1; i < n; i++)
    {
        int diff = parr[i].num - parr[i - 1].num;
        for (int i = 0; i < diff - 1; i++)
        {
            cout << "-";
        }
        cout << parr[i].msg;
    }
}