Mega Code Archive
Manage list of employees based on STL
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#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <list>
#include <algorithm>
const unsigned int LENGTH = 5;
class EmployeeList {
public:
typedef std::vector<int> grades;
std::map<std::string, grades> roster;
std::list<std::string> waiting_list;
public:
public:
void add(const std::string& name);
void remove(const std::string& name);
void record(const std::string& name,const int grade,const unsigned int assignment_number);
void display();
private:
void newEmployee(const std::string& name)
{
grades no_grades;
roster.insert(
std::pair<std::string, grades>(name, no_grades));
}
};
void EmployeeList::add(const std::string& name)
{
if (roster.find(name) != roster.end())
return;
if (roster.size() < LENGTH) {
newEmployee(name);
} else {
waiting_list.push_back(name);
}
}
void EmployeeList::remove(const std::string& name)
{
std::map<std::string, grades>::iterator anEmployee = roster.find(name);
if (anEmployee == roster.end())
return;
roster.erase(name);
if (waiting_list.size() > 0) {
std::string wait_name = waiting_list.front();
waiting_list.pop_front();
newEmployee(wait_name);
}
}
void EmployeeList::record(const std::string& name,const int grade,const unsigned int assignment_number)
{
std::map<std::string, grades>::iterator anEmployee =
roster.find(name);
if (anEmployee == roster.end())
{
std::cerr << "ERROR: No " << name << '\n';
return;
}
if (anEmployee->second.size() <= assignment_number)
anEmployee->second.resize(assignment_number+1);
anEmployee->second[assignment_number] = grade;
}
void EmployeeList::display()
{
std::vector<std::string> sorted_names;
std::map<std::string, grades>::iterator curEmployee;
for (curEmployee = roster.begin();curEmployee != roster.end();++curEmployee){
sorted_names.push_back(curEmployee->first);
}
std::sort(sorted_names.begin(), sorted_names.end());
std::vector<std::string>::const_iterator cur_print;
for (cur_print = sorted_names.begin();cur_print != sorted_names.end();++cur_print)
{
std::cout << *cur_print << '\t';
grades::const_iterator cur_grade;
for (cur_grade = roster[*cur_print].begin();cur_grade != roster[*cur_print].end();++cur_grade)
{
std::cout << *cur_grade << ' ';
}
std::cout << '\n';
}
}
int main()
{
EmployeeList empList;
empList.add("A, S");
empList.add("B, M");
empList.add("J, R");
empList.add("S, J");
empList.add("M, M");
empList.add("G, W");
empList.add("C, W");
std::cout << "Before drop " << std::endl;
empList.display();
std::cout << "\n";
empList.remove("J, R");
std::cout << "After drop " << std::endl;
empList.display();
std::cout << "\n";
for (int i = 0; i < 5; ++i){
empList.record("A, S", i*10+50, i);
empList.record("B, M", i*10+50, i);
empList.record("S, J", i*10+50, i);
empList.record("M, M", i*10+50, i);
empList.record("G, W", i*10+50, i);
}
std::cout << "Final " << std::endl;
empList.display();
std::cout << "\n";
return (0);
}
Before drop
A, S
B, M
J, R
M, M
S, J
After drop
A, S
B, M
G, W
M, M
S, J
Final
A, S 50 60 70 80 90
B, M 50 60 70 80 90
G, W 50 60 70 80 90
M, M 50 60 70 80 90
S, J 50 60 70 80 90
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