C++ Program code for FCFS

This is solution for FCFS scheduling algorithm using C++ Object Oriented Approach

#include <iostream>
#include <conio.h>
using namespace std;
int time[20];
int timeLength;
int pt[20];
int ptLength;
class FCFS
{
public:

    void askAC()
    {
        cout << "Enter Arrival : " ;
        cin >> arrivalTime ;
        cout <<"and Cpu Burst : ";
        cin >> cpuBurstTime;

    }


    int getArrival()
    {
        return arrivalTime;
    }


    int getCpu()
    {
        return cpuBurstTime;
    }


    void setWt(int n)
    {
        WT = n;
    }

    int getWt()
    {
        return WT;
    }
    void setTat()
    {
        TAT = WT+cpuBurstTime;
    }

    int getTat()
    {
        return TAT;
    }


private:
    int arrivalTime;
    int cpuBurstTime;
    int WT;
    int TAT;

};
int main()
{
    FCFS p[5];
    int a;
    for(int i =0;i<5;i++)
    {
        cout << "For p[" << i << "]" << endl;
        p[i].askAC();
    }
    time[timeLength++] = 0;

    for(int i = 0; i < 5; i++)
    {


        a = time[timeLength-1]-p[i].getArrival();

        if(a<0){
            time[timeLength] = -a + time[timeLength-1];
        timeLength++;
        pt[ptLength++] = 333;
            a = 0;
        }
        p[i].setWt(a) ;
        p[i].setTat( );
        if(time[timeLength-1] < p[i].getArrival() ){

            time[timeLength] = p[i].getArrival() + p[i].getCpu();
            timeLength++;
            pt[ptLength++] = i;

        }
        else{
            time[timeLength] = time[timeLength-1]+p[i].getCpu();
            timeLength++;
            pt[ptLength++] = i;

        }


    }
    cout << endl;
    for(int i = 0; i < timeLength; i++)
    {
        cout <<  time[i] <<"\t" ;
    }
    cout << endl;
    for(int i = 0; i < ptLength; i++)
    {
        if(pt[i] == 333)
            cout << "idle\t";
        else
        cout <<  "  p[" << pt[i] << "]\t";
    }

    cout <<endl<< ".";
    cout << endl<< endl;

    for(int i =0 ;i<5 ;i++)
    {
        cout <<  "waiting time p[" << i << "] :" << p[i].getWt() << endl;
        cout <<  "TAT p[" << i << "] :" << p[i].getTat() << endl;
    }
    return 0;
}