My code complies fine but freezes when i try to run it.

I Believe the error is somewhere between lines 82-115

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include <cmath>


using namespace std;

struct domList
{
string domName;
string ipAddress;
int counter;
};

void insertOne(domList list[], ifstream& inFile, int len);
void change(domList list[], string dName, string IpNum, int len);
void Delete(domList list[], string dName, int& lengthList);  
void Find(domList list[], string dName, int len); 
void Print (domList list[], int len);
void Quit (domList list[], int len);
void topDom(domList list[], int len);

int main (){
    
    char command;
    
    domList list[100];
    int listLength = 0;
    
    string ipNum, DomName;
    int counter = 0;
    bool x;
    ifstream dataFile;
    
    //stores the name of the dataFile
    string dataFile1;
    
    cout << "Please enter the data file you wish to use: ";
    cin >> dataFile1;
      
    dataFile.open (dataFile1.c_str());
    if (!dataFile) 
    {
       cout << "bummer file\n\n";
       system ("pause");
       return 1;
    }
    
    while(!dataFile.eof()){
       dataFile >> command;
       
       if(command == 'A')
       {
            insertOne(list, dataFile, listLength);
            listLength++;           
       }
       else if(command == 'M')
       {
            change(list, DomName, ipNum, listLength);          
       }
       else if(command == 'D')
       {
            Delete(list, DomName, listLength);
            listLength--;     
       }
       else if(command == 'F')
       {
            Find(list, DomName, listLength);     
       }
       else if(command == 'P')
       {
            Print(list, listLength);     
       }
       else if(command == 'Q')
       {
            Quit(list, listLength);
            Print(list, listLength);    
       }
    }
       dataFile.close();
       cout << endl << endl << endl;
       topDom(list, listLength);
       
       int high = list[0].counter;
       for (int i = 1; i < listLength; i++)
       {
            if(list[i].counter > high)
            {
                  high = list[i].counter;                  
            }
       }
       
       cout << "The domain with the highest counter is: "
            << high << endl;
            
       ofstream out;
       out.open("info.txt");
       
       for (int i = 0; i < listLength; i++)
       {
           out << setw(23) << list[i].domName << setw(20)
               << list[i].ipAddress << setw(6)
               << list[i].counter << endl;
       }
       
       out << "Programmed By: Chris Cummings" << endl;
       out << "Date: 11/10/2011" << endl;
       out << "Lab CRN: 10945" << endl;
       
       out.close();
       
       system("pause");
       return 0;
       
}

void insertOne(domList list[], ifstream& inFile, int len)
{
     domList one;
     inFile >> one.domName >> one.ipAddress;
     one.counter = 0;
     list[len] = one;
}

void change(domList list[], string dName, string IpNum, int len)
{
     for(int i = 0; i < len; i++)
     {
          if(list[i].domName == dName)
          {
                list[i].ipAddress = IpNum;
                list[i].counter += 1;
          }
     }
}

void Delete(domList list[], string dName, int& lengthList)
{
     for(int i = 0; i < lengthList; i++)
     {
          if(list[i].domName == dName)
          {
               for(int l = i; l < lengthList; l++)
               {
                     list[l] = list[l+1];
                     lengthList--;
               }
          }
     }
}

void Find(domList list[], string dName, int len)
{
     for (int i = 0; i < len; i++)
     {
         if (list[i].domName == dName)
         {
              cout << "The ip Address for " << list[i].domName 
                   << " is " << list[i].ipAddress <<  endl;
              list[i].counter += 1;
         }    
     }
}

void Print (domList list[], int len)
{
     cout << "\n\n\nPrinting" << endl;
     for (int i = 0; i < len; i++)
     {
         cout << setw(23) << left << list[i].domName << setw(20)
              << list[i].ipAddress << setw(6)
              << list[i].counter << endl;
     }
}

void Quit (domList list[], int len)
{
     domList one, two;
     int min, temp;
     for(int i = 0; i < len; i++)
     {
          min = i;
          for(int l = 1; l < len; l++)
          {
               if(list[l].domName.substr(5,5) < list[i].domName.substr(5,5))
                    min = l;    
          }
          one = list[i];
          list[i] = list[min];
          list[min] = one;
     }
}

void topDom(domList list[], int len)
{
     int edu, com, org, net, largest;
     string highest;
     for (int i = 0; i < len; i++)
     {
          if(list[i].domName.substr(len-3, len) == "edu")
               edu++;
          else if(list[i].domName.substr(len-3, len) == "com")
               com++;
          else if(list[i].domName.substr(len-3, len) == "org")
               org++;
          else if(list[i].domName.substr(len-3, len) == "net")
               net++;
     }
     if(edu > com && edu > org && edu > net)
     {
          cout << ".edu is the most popular domain with " << edu << endl;
          cout << "List of .edu domains";
          for (int i = 0; i < len; i++)
          {
               if(list[i].domName.substr(len-3, len) == "edu")
               {
                    cout << setw(23) << left << list[i].domName << setw(20)
                         << list[i].ipAddress << setw(6)
                         << list[i].counter << endl;   
               }
          }
     }
     else if(com > edu && com > org && com > net)
     {
          cout << ".com is the most popular domain with " << edu << endl;
          cout << "List of .com domains";
          for (int i = 0; i < len; i++)
          {
               if(list[i].domName.substr(len-3, len) == "com")
               {
                    cout << setw(23) << left << list[i].domName << setw(20)
                         << list[i].ipAddress << setw(6)
                         << list[i].counter << endl;   
               }
          }     
     }
     else if(org > edu && org > com && org > net)
     {
          cout << ".org is the most popular domain with " << edu << endl;
          cout << "List of .org domains";
          for (int i = 0; i < len; i++)
          {
               if(list[i].domName.substr(len-3, len) == "org")
               {
                    cout << setw(23) << left << list[i].domName << setw(20)
                         << list[i].ipAddress << setw(6)
                         << list[i].counter << endl;   
               }
          }
     }
     else if(net > edu && net > com && net > org)
     {
          cout << ".net is the most popular domain with " << edu << endl;
          cout << "List of .net domains";
          for (int i = 0; i < len; i++)
          {
               if(list[i].domName.substr(len-3, len) == "net")
               {
                    cout << setw(23) << left << list[i].domName << setw(20)
                         << list[i].ipAddress << setw(6)
                         << list[i].counter << endl;   
               }
          }
     }
}

Something tells me listLength is going below zero before it is used.
Can you check the value in the debugger right before 82?

I ran to right before 82 and it worked it is that part right after 82 that is causing error.

What is the value of listLength right before 82?

At the bottom it says 80:9 and when i run it it prints out 16 different domain names with ip addresses 4 different times