c – stl map <>中的分段错误

我不是很擅长c,但我必须测试一个基于声誉的系统.下面给出了一个代码片段,当我在ubuntu系统上运行它时,它给出了段错误.正如我在评论中写的那样,两个函数“tackleFirstHandInfo()”和“updateReputation()”分别正确运行但是当我从另一个函数调用一个函数时它会崩溃.任何帮助将不胜感激,提前感谢.代码如下：

"ex.h"

#ifndef _ex_h
#define _ex_h
#include "iostream"
#include <map>
#define FADING 0.9
enum Behaviour {FORWARDING,NOTFORWARDING};

class Rating
{

private:
    double reputation;

public:

    Rating() { reputation = 5.0; }
    Rating(double rep) {reputation = rep;}

    ~Rating() {}

    double getRep() { return reputation; }

    void updateRep(Behaviour behaviour) {
        if (behaviour == FORWARDING)
            reputation = reputation + 1;    
        else 
            reputation = reputation - 1;    
    } 

};

#endif

"ex.cc"

#include <map>                                  
#include <string>
#include <iostream>   
#include "ex.h"                           
using namespace std;
typedef map<int,Rating*> ratingTable;
class RepSys {
private:
    ratingTable repTable; 
    map<int,Rating*> fHandInfo;
    Rating* rating;

public: 
    RepSys(){}
    ~RepSys(){}

    void tackleFirstHandInfo(int address,Behaviour behaviour)
    /* This Function and the function below individually run correctly */
    {
        map<int,Rating*>::iterator it;
        it=fHandInfo.find(address);
        if (it == fHandInfo.end()) {
            cout << "Adding New Entry for (fHandInfo) "<< address <<endl;
            rating = new Rating();   
            fHandInfo[address] = rating;
        }
        (it->second)->updateRep(behaviour);
        cout<<"First Hand Reputation of "<<address<<"t is ="<< (it->second)->getRep()<<endl;
        updateReputation(address,behaviour); // This causes SegFault !!!!
        return;
    }

    void updateReputation(int address,Behaviour behaviour)
    {
        map<int,Rating*>::iterator it;
        it = repTable.find(address);
        if (it == repTable.end()) {
            cout << "Adding New Entry for (repTable) "<< address <<endl;
            rating = new Rating(); 
            repTable[address] = rating;
        }
        (it->second)->updateRep(behaviour);
        cout<<"Reputation of "<<address<<"t is ="<< (it->second)->getRep()<<endl;
    }   
};

int main() {
    int address;    
    RepSys repsys;
    while (address != 0)
    {                                
        cout << "Addressn";
        cin >> address;
        repsys.tackleFirstHandInfo(address,FORWARDING);
    }
    return 0;
}

if (it == fHandInfo.end()){
    // Some code that doesn't alter 'it'
}
(it->second)->updateRep(behaviour);

class RepSys {
private:
    ratingTable repTable; 
    map<int,Rating*> fHandInfo;
    Rating* rating;