Работа с табличными базами данных. Реализация функции сортировки.

//project.cpp - Lab. #8 
#define lname 80
#include<iostream>
#include<fstream>
#include<vector>
#include<algorithm>
using namespace std;
//Îïèñàíèå êëàññà Èíæåíåð
char buf_str[lname];
class Engineer
{ private: static int count; char name[lname]; int age; int rank;
friend class Project;
public: Engineer(); ~Engineer();
void set_name(const char*); 
char* get_name();
void set_age(int); 
int get_age(); void set_rank(int);int get_rank(); 
void show(); void read();
};
int Engineer::count = 0; 
// Ðåàëèçàöèÿ ìåòîäîâ êëàññà Èíæåíåð
Engineer::Engineer(){count++;};
Engineer::~Engineer(){count--; };
void Engineer::set_name(const char*r) { cout<<strlen(r); if (strlen(r) <= lname) {strcpy(name,r);}
else {cout<<"Engineer::set_name: too long name";}
};
char *Engineer::get_name() {return &name[0];};
void Engineer::set_age(int r) {age=r;};
int Engineer::get_age() {return age;};
void Engineer::set_rank(int r) {rank=r;};
int Engineer::get_rank() {return rank;};
void Engineer::show(){cout<<" Name ="<<name<<" Age of engineer= "<<age<<"Rank ="<<rank;};
void Engineer::read() {cout<<"Input Engineer Name "; cin.getline(name, lname);
cout<<" Input Age of engineer "; cin.getline(buf_str, lname); age=atoi(buf_str);
cout<<"Input Rank "; cin.getline(buf_str, lname); rank=atoi(buf_str);};
 
//îïèñàíèå êëàññà Ïðîãðàììèñò
class Programmer: public Engineer
{private: char language [lname]; char organization[lname];
public: void set_language(const char *); char *get_language();
void set_organization(const char *); char *get_organization();
void show(); void read();
};
//Ðåàëèçàöèÿ ìåòîäîâ êëàññà Ïðîãðàììèñò 
void Programmer::set_language(const char *r) {if (strlen(r) <= lname) strcpy(language, r);};
char *Programmer::get_language() {return &language[0];};
void Programmer::set_organization(const char *r) {int i; for (i=0; i<=lname-1; i++)
organization[i]=r[i];};
char *Programmer::get_organization() {return &organization[0];};
void Programmer::show() {Engineer::show(); cout<<" Language="<<language<<" Organization="<<organization<<endl;};
void Programmer::read() {Engineer::read(); cout<<"Input Language "; cin.getline(language, lname);
cout<<" Input Organization ";
cin.getline(organization,lname);};
//îïèñàíèå êëàññà Ïðîåêò
#define max_nprogrammers 20
class Project
{ private: string name; string designer; //
vector <Programmer> Programmers;
vector <Programmer>::iterator pProgrammers;
public: Project();
void set_name(const string); string get_name();
void set_designer(const string); string get_designer();
void show();
void add_programmer(); 
void del_last_programmer(); 
void show_programmers();
void input_programmer(); 
Programmer*find_name(char *name);
void sort_programmer();// ôóíêöèÿ ñîðòèðîâêè/27 àïðåëÿ
void read_file(int); void save_file();
void financing(); void list_programmers();
void del_programmer(); 
void del_programmer_name();
void clear(){Programmers.clear();};
};
//Ðåàëèçàöèÿ ìåòîäîâ êëàññà Ïðîåêò
Project::Project() {};
void Project::set_name(const string r) {name=r;};
string Project::get_name() {return name;};
void Project::set_designer(const string r) {designer= r;};
string Project::get_designer() {return designer;};
//*  
void Project::show() {cout<<" Project="<<name<<" Designer ="<<designer<<endl;};
void Project::add_programmer() {Programmer b; b.read(); Programmers.push_back(b);};
void Project::del_last_programmer() {Programmers.pop_back();};
void Project::show_programmers() {int i;
for (i=0; i<Programmers.size(); i++) Programmers[i].show();};
void Project::del_programmer_name()
{
cout<<"input book's name for remove"<<endl;
cin.getline(buf_str, lname);
pProgrammers=Programmers.begin();
vector <Programmer>::iterator pProgrammers1;
int i=0;
while (pProgrammers != Programmers.end())
{
if ( strcmp(buf_str, Programmers[i].name)== 0 ) {pProgrammers=Programmers.erase(pProgrammers);
pProgrammers=pProgrammers-1;i--;};
pProgrammers++; i++;
};
};
void Project::save_file()
{int i; string namefile;
namefile=name+".fbd";
ofstream fp(namefile.c_str(), ios::out|ios::binary);
for (i=0; i<Programmers.size(); i++) { fp.write( (char *) &Programmers[i], sizeof(Programmer));
};
fp.close();
cout<<"Project::save_file: BD was saved to '"<<namefile<<"'"<<endl;
};
void Project::read_file(int new_append)
{
Programmer s; string namefile;
cout<<"available files"<<endl;
system("dir *.fbd");
cout<<"input name file"<<endl;
cin>>namefile;
namefile=namefile+".fbd";
ifstream fp(namefile.c_str(), ios::in|ios::binary);
if(!fp){cout<<"Project::read_file: error"<<endl; return;};
if (new_append == 0) Programmers.clear();
while(!fp.eof())
{
Programmer *t; t = new Programmer;
fp.read((char *) t, sizeof(Programmer));
Programmers.push_back(*t);
};
Programmers.pop_back();
fp.close();
cout<<"Project::read_file: file '"<<namefile<<"' was read"<<endl;
cin.ignore();
};
void Project::financing()
{int i, s=0;
int nprogrammers=Programmers.size();
for (i=1; i<=nprogrammers; i++)
{s=s+Programmers[i-1].age;
};
cout<<"Financing= "<<s<<endl;
};
void Project::list_programmers()
{
pProgrammers=Programmers.begin();
for (int i=0; i<Programmers.size(); i++)
{
Programmers[i].show();
cout<<"correct? (y/n/d/a"<<endl;
char c; cin.get(c); cin.ignore(INT_MAX,'\n');
if(c == 'y') Programmers[i].read(); //èçìåíèòü ýëåìåíò
if(c == 'd') {pProgrammers=Programmers.erase(pProgrammers+i); pProgrammers--;}; //óäàëèòü ýëåìåíò
if(c == 'a') {Programmer t; t.read();
Programmers.insert(pProgrammers+i, t);}; //äîáàâèòü ýëåìåíò;
 
};
}