How to pass vector as reference in C++? - c++

Question

I want to pass my vector "myStaffs" from Team Class by reference to Manage Class because I want to manipulate the data of staffs and sort them. How do I pass it by reference?
Header Staff
#ifndef STAFF_H
#define STAFF_H
#include <vector>
#include <cstdlib>
#include <ctime>
#include <string>
class Staff
{
public:
Staff();
Staff(int, int, int, int);
~Staff();
static int genRanNum(int);
static Staff* createStaff(int);
const int getSize();
private:
int staSkills1,staSkills2,staSkills3;
int staId;
//int staDeptAsigned;
//std::string staName;
};
#endif
CPP Staff
#include "Staff.h"
#include <iostream>
using namespace std;
Staff::Staff():
staId(0),
staSkills1(0),
staSkills2(0),
staSkills3(0)
{
}
Staff::Staff(int id, int s1, int s2, int s3):
staId(id),
staSkills1(s1),
staSkills2(s2),
staSkills3(s3)
{
}
Staff *Staff::createStaff(int s)
{
Staff *staff = new Staff();
staff->staId = s;
staff->staSkills1 = genRanNum(10);
staff->staSkills2 = genRanNum(10);
staff->staSkills3 = genRanNum(10);
return staff;
}
int Staff::genRanNum(int num)
{
return 1+(rand()%num);
}
Staff::~Staff()
{
}
Header Team
#ifndef TEAM_H
#define TEAM_H
#include "Staff.h"
#include <vector>
#include <iostream>
using std::vector;
class Team: public Staff
{
public:
Team();
~Team();
private:
vector<Staff *> myStaffs;
};
#endif // TEAM_H
CPP Team
#include "Team.h"
const int SIZE = 30;
Team::Team():
myStaffs(SIZE)
{
for(int iStaff = 0; iStaff <= SIZE; iStaff++)
{
myStaffs[iStaff] = createStaff(iStaff);
}
}
Team::~Team()
{
}
Header Manage
#ifndef OPTIONS_H
#define OPTIONS_H
#include "Team.h"
#include <vector>
#include <iostream>
using std::vector;
class Manage
{
public:
Manage();
~Manage();
private:
// vector
};
CPP Manage
#include "Manage.h"
Manage::Manage()
{
}
Manage::~Manage()
{
}
#endif

Answer 1

Its simple you pass it as you would pass any other object by reference
int sortEmployee(std::vect<Staff *> &staffList> {
// ... code to sort Employee
}
and you can call it like below
vector<Staff *> myStaffs
result = sortEmployee(myStaffs);

Answer 2

It's as simple as
#include <vector>
void myVectorManglingFun(std::vector<Staff *> &myStaff) //notice the &
{
//do something here
}
If you don't need to modify the vector, then always use a const reference.
void myVectorReadingFun(const std::vector<Staff *> &myStaff)