cut pcap file header

cut-224.c

#include<iostream>
#include<fstream>

using namespace std;

int printhex(char c){
        if(int(c) < 0) {
                printf("%02x",int(c^0xffffff00));
        }else{
                printf("%02x",int(c));
        }
        return 0;
}

int main(){
        char x;
        int count=0;
        ifstream ifs;
        streampos pos;
        streampos stop_pos;
        ifs.open("arp-1_anon.pcapng", ios::binary|ios::in);
        ifs.seekg(0, ios_base::end);
        stop_pos=ifs.tellg();

        ifs.seekg(224, ios_base::beg);  
        pos=ifs.tellg();
        while(pos!=stop_pos){
          if(count%104==0){
                  cout<<"\n";
          }
          ifs.read(&x,1);
          printhex(x);
          pos=ifs.tellg();
          count++;
        } 
        ifs.close();
        return 0;
}