Framing

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

void characterCount()
{
    string dataStream;
    cout << "enter data for character count methode:";
    cin >> dataStream;
    string ans = "";
    int i = 0;
    int Count = 1;
    while (i < dataStream.length())
    {
        int FrameLength = int(dataStream[i]) - '0';
        if (FrameLength == 0)
        {
            cout << "frame size cannot be 0.enter correct data" << endl;
            break;
        }

        for (int curr = 0; curr < FrameLength; curr++)
        {
            if (dataStream[i + curr] != '\0')
            {
                ans = ans + dataStream[i + curr];
            }
        }
        int len = ans.length();
        if (len == FrameLength)
        {
            cout << "Frame " << Count << " has " << FrameLength << " character and frame is:" << ans << endl;
        }
        else
        {
            cout << "Frame " << Count << " has " << FrameLength << " characters but data is unsufficient" << endl;
        }

        i = i + FrameLength;
        Count++;
        ans = "";
    }
}
void bitStuffing()
{
    string bitStream;
    cout << "enter binary data for bit stuffing methode:";
    cin >> bitStream;
    int consecutiveOnes = 0;
    string terminal = "01111110";
    string frame = terminal;
    for (int i = 0; i < bitStream.length(); i++)
    {
        if ('1' == bitStream[i])
        {
            consecutiveOnes++;
        }
        else
        {
            consecutiveOnes = 0;
        }
        frame = frame + bitStream[i];
        if (consecutiveOnes == 5)
        {
            consecutiveOnes = 0;
            frame = frame + '0';
        }
    }
    frame = frame + terminal;
    cout << "Frame which is to be transmitted:" << frame << endl;
}

void characterStuffing()
{
    int n;
    string byteStream[20];
    string data;
    vector<string>frame;
    cout<<"enter number of bytes:";
    cin>>n;
    cout<<"data in bytes:"<<endl;
    for(int i=0;i<n;i++)
    {
         cin>>data;
          byteStream[i]=data;
    }
    string start="DLE STX";
    string end="DLE ETX";
    string escape="DLE";
    frame.push_back(start);
   for(int i=0;i<n;i++)
   {
      if(byteStream[i]==escape)
      {
          frame.push_back(escape);
      }
      frame.push_back(byteStream[i]);
   }
   frame.push_back(end);
   cout<<"Frame that is to be trasmited is:";
   for(int i=0;i<frame.size();i++)
   {
       cout<<frame[i]<<" ";
   }
   
}

int main()
{
    int choice;
    cout << "select choice:" << endl;
    cout << "1.character count" << endl;
    cout << "2.bit stuffing" << endl;
    cout << "3.character stuffing" << endl;
    cout << "\n\n";
    while (1)
    {
        cout << "enter choice:";
        cin >> choice;
        switch (choice)
        {
        case 1:
            characterCount();
            break;
        case 2:
            bitStuffing();
            break;
        case 3:characterStuffing();
            break;
        default:cout<<"wrong choice";
        }
        cout<<"\n\n";
    }
}