分段错误（核心转储），将char *存储到struct的字符串向量

Question

#include <iostream>
#include <fstream>
#include <string.h>
#include <string>
#include <stdio.h> 
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <semaphore.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/ipc.h>
#include <vector>
#include <sstream>
#define SHMSIZE 1024

using namespace std;

namespace patch
{
    template < typename T > std::string to_string( const T& n )
    {
        std::ostringstream stm ;
        stm << n ;
        return stm.str() ;
    }
}

struct process
{
    int r;
        string name;
        vector<string> lines;
};

int main(int argc, char * argv[])
{
     int firstRun = 1;  //Skipping First Line of Assign-1.ip.

        int quantum = 0;    //For taking input of quantum.
        int count = 0;      //For number of processes.
        int pchtoint;
        string c;
        char * pch;     //For tokenization.

        string reading_file;    //Reading a line from file.

        char * readarr;     //Converting "reading_file" to readarr for tokenization.

        process * p;

        //=== Quantum Input ===//
        cout<<"Enter Quantum size [1-1000]: ";
        cin>>quantum;

        while(quantum < 1 || quantum > 1000)
        {
              cout<<"Wrong input!!! Enter Again [1-1000]: "; 
              cin>>quantum;
        }
        //=====================//

        //===Filing===//
        ifstream read("Assign-2.ip");

        if(read.is_open())
        {
                while(!read.eof())
                {
                        getline(read, reading_file);

                        readarr = new char[reading_file.size() + 1];
                        for(int i = 0; i < reading_file.length(); i++)
                        {
                                readarr[i] = reading_file[i];
                        }

                        if(firstRun > 1)
                        {
                            int countingline = 0;           //counting the number of lines in a process.
                        pch = strtok (readarr," ,");

                        while (pch != NULL)
                        {
                            c = pch[1];
                            pchtoint = atoi(c.c_str());
                        p[pchtoint-1].r++;
                        p[pchtoint-1].lines.push_back(pch);
                        for(int i = 0; i < p[pchtoint-1].lines.size(); i++)
                            cout<<p[pchtoint-1].name<<"=="<<p[pchtoint-1].lines.at(i)<<endl;


                                    pch = strtok (NULL, " ,");     
                        }
                }
                else
                {
                    pch = strtok (readarr,",.-");
                        while (pch != NULL)
                        {   
                                count++;
                                pch = strtok (NULL, ",.-");  
                        }
                        p = new process[count];
                        string s = "p";
                        for(int i = 0; i < count; i++)
                {
                    s = s + patch::to_string(i+1);
                    p[i].name = s;
                    s = s[0];
                }
                            firstRun++;
                        }   
                }
        }
        else
        {
                cout<<"Cannot open file!!!"<<endl;
        }
        read.close();
        return 0;
}

输入量子大小[1-1000]：2

P1 == P1-L1

P2 == P2-L1

P3 == P3-L1

P1 == P1-L1

P1 == P1-L2

P2 == P2-L1

P2 == P2-L2

P3 == P3-L1

P3 == P3-L2

P1 == P1-L1

P1 == P1-L2

P1 == P1-L3

P3 == P3-L1

P3 == P3-L2

P3 == P3-L3

P1 == P1-L1

P1 == P1-L2

P1 == P1-L3

P1 == P1-L4

分段错误（核心转储）

我正在读取cvs文件中的数据。并将其存储在此处的结构中。但我不知道它为什么会出现分段错误。我正在ubuntu终端上编译它。

输入文件包含数据： P1，P2，P3，

p1-l1，p2-l1，p3-l1

p1-l2，p2-l2，p3-l2

p1-l3，，p3-l3

p1-l4 ,,