Hey can anyone help me with the below errors please?
vector.cpp: In function 'void printEmployees(const std::vector<employee, std::allocator<employee> >&)':
vector.cpp:104: error: passing 'const employee' as 'this' argument of 'void employee::printEmployee()' discards qualifiers
#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <fstream>
#include <stdlib.h>
using namespace std;
class employee
{
/* Employee class to contain employee data
*/
private:
string surname;
double hourlyRate;
int empNumber;
public:
employee() {
hourlyRate = -1;
empNumber = -1;
surname = "";
}
employee(const employee &other) :
surname(other.surname),
hourlyRate(other.hourlyRate),
empNumber(other.empNumber)
{
// copy constructor
}
void setEmployee(const string &name, double rate, int num) {
surname = name;
hourlyRate = rate;
empNumber = num;
}
const string& getSurname() const {
return surname;
}
void printEmployee() {
cout << fixed << setprecision(2);
cout << setw(20) << left << surname << setw(4) << empNumber << " " << hourlyRate << "\n";
}
void loadEmployee(ifstream &fin) {
fin >> surname;
fin >> hourlyRate;
fin >> empNumber;
}
};
void swap(vector<employee> employees, int a, int b);
void sortEmployees(vector<employee> &employees);
void printEmployees(const vector<employee> &employees);
void loadEmployees(vector<employee> &employees, const char *file);
int main(int argc, char *argv[])
{
vector<employee> employees;
if (argc != 2) {
cout << "Syntax : employee employeefile\n";
return 0;
}
loadEmployees(employees, argv[1]);
printEmployees(employees);
sortEmployees(employees);
printEmployees(employees);
return 0;
}
void loadEmployees(vector<employee> &employees, const char *file)
{
ifstream fin;
employee emp;
fin.open(file);
if (!fin) {
cout << "Unable to read from " << file << "\n";
exit(0);
}
while (!fin.eof()) {
emp.loadEmployee(fin);
employees.push_back(emp);
}
fin.close();
}
void printEmployees(const vector<employee> &employees)
{
unsigned int i;
for (i=0; i<employees.size(); i++) {
employees[i].printEmployee();
}
printf("\n");
}
void swap(vector<employee> employees, int a, int b)
{
employee temp(employees[a]);
employees[a] = employees[b];
employees[b] = temp;
}
void sortEmployees(vector<employee> &employees)
{
/* use selection sort to order employees,
in employee name order
*/
int number = employees.size();
int inner, outer, max;
for (outer=number-1; outer>0; outer--)
{
// run though array number of times
max = 0;
for (inner=1; inner<=outer; inner++)
{
// find alphabeticaly largest surname
if (employees[inner].getSurname() > employees[max].getSurname())
max = inner;
}
if (max != outer)
{
// swap largest with last element in array
swap(employees, max, outer);
}
}
}