Вопрос о цикличности

cout << "1. Add, 2.Search, 3.Exit" << endl;

do
{
   cout << "1. Add, 2.Search, 3.Exit" << endl;
   cin >> c;
   switch (c)
   {
      case 1:
         Add();
         break;
      case 2:
         Search();
         break;
   }
}while(c != 3);

int main()
{
 phone numb[75], numbn[75];
 char next;
 char number[15];
 int i, c;
 do
 {
 cout << "1.Add contact, 2.Search contact, 3.Exit" << endl;
 cin >> c;
 switch (c)
 {
 case 1:
 ofstream fileout("file.txt", ios::app);
 if(!fileout)
 {
 cerr << "Error: opening file" << endl;
 return 1;
 }
 for(i=0;i<1;i++)
 {
 cout << "Enter firstname, lastname, middlename, number" << endl;
 cin >> numb[i];
 fileout << numb[i];
 }
 break;
 case 2:
 cout << "Enter number of the contact:";
 cin >> number;
 ifstream filein("file.txt");
 if(!filein)
 {
  cerr << "Error: opening file";
  return 2;
 }
 i=0;
 while(1)
 {
  filein >> numbn[i];
  if(!strcmp(numbn[i].number, number))
  {
  cout << numbn[i];
  break;
  }
  next=filein.peek();
  if(next==EOF)break;
  i++;
 }
 break;
 }
 while(c !=3);
 }
 return 0;
}

fstream filestr;
filestr.open("file.txt", fstream::in | fstream::out | fstream::app);
filestr.close();