Отсортировать массив структур

#include <conio.h> 
#include <string>
#include <iostream> 
#include <fstream> 
#include <cstring> 
#include <iomanip>
#include <cstdlib>
using namespace std;  
struct base //ñòðóêòóðà
{ 
    string name; 
    int years; 
    string pos; 
    string club;
    int goals;
    int assists;
    int matches;
    float sallary; 
}club; 
void addData();
void clearData();
void saveData();
void showData();
int main() 
{
    int z;
    do//ìåíþ âèêîíóºòüñÿ
    {
        cout<<"-----------------------------------------------------------------------------------\n";
        cout<<"[1]Add player\n[2]Check players\n[3]Delete info\n[4]Exit\n";
        cout<<"-----------------------------------------------------------------------------------\n";  
        cin >> z;
        if(z==1)
        {   
            int a;
            do
            {
                addData();//---------------------çâåðåíåííÿ äî ôóíêö³¿ äëÿ ââîäó äàíèõ
                saveData();// äëÿ çáåðåæííÿ äàíèõ
                cout << "Do you want to add one more player ? Yes - press '1'; No - press'0'\n" << endl;
                cin >> a; 
            }
            while(a==1);
            system("cls");
        }
        else if(z==2)//âèâåñòè ãðàâö³â ó ôîðì³ òàáëèö³ ç ôàéëó
        { 
            showData();
        }
        else if(z==3)
        {
            clearData();
        }
         if(z==4)//âèõ³ä ç ïðîãðàìè
        {
            exit(1);
        }
    }
    while(z!=4);
    _getch(); 
    return 0; 
}
//-----------------------------------------------------------------------------------------------------------------
void addData()//ôóíêöÿ äëÿ ââîäó ³ çáåðåæåííÿ äàíèõ
{
    int a;
    cout<<"-----------------------------------------------------------------------------------\n";      
    base *b; // îáÿâëåííÿ âêàç³âíèêà íà ñòðóêòóðó
    b=&club;    
    cout << "Enter name :"<< endl; 
    cin >>b->name; 
    cout << "Enter years :" << endl; 
    cin >>b->years; 
    cout << "Enter pos :" << endl; 
    cin >> b->pos; 
    cout << "Enter previous club :" << endl; 
    cin >> b->club; 
    cout << "Enter goals :" << endl; 
    cin >> b->goals; 
    cout << "Enter assists :" << endl; 
    cin >> b->assists;
    cout << "Enter matches :" << endl; 
    cin >> b->matches;
    cout << "Enter sallary(millions) :" << endl; 
    cin >> b->sallary;   
    cout<<"-----------------------------------------------------------------------------------\n";  
}
//-----------------------------------------------------------------------------------------------------------------
void saveData()
{
    base *b; // îáÿâëåííÿ âêàç³âíèêà íà ñòðóêòóðó
    b=&club;
    ofstream team ("RealMadrid.txt",ios::ate|ios::app);//çàïèñ ñòðóêòóðè â ôàéë
    team<<b->name <<"\t"<< b->years << "\t" << b->pos <<"\t"<<b->club<< "\t" << b->goals << "\t"<< b->assists << "\t"<<b->matches << "\t"<< b->sallary << "\t"<< endl; 
}
//-----------------------------------------------------------------------------------------------------------------
void clearData()
{   
    fstream clear_file("RealMadrid.txt", ios::out);
    clear_file.close();
    system("cls");
}
//-----------------------------------------------------------------------------------------------------------------
void showData()
{
    system("cls");
    cout<<"-----------------------------------------------------------------------------------\n";  
        cout<<"name\t"<<"years\t"<<"pos\t"<<"club\t"<<"goals\t"<<"assists\t"<<"matches\t"<<"sallary(millions)\n";
        cout<<"-----------------------------------------------------------------------------------\n";  
        ifstream team("RealMadrid.txt"); 
        while(team)
        { 
            string str; 
            getline(team, str); 
            cout << str << endl; 
        };
}
//-----------------------------------------------------------------------------------------------------------------