Priority | Retno

import java.util.Scanner;

public class Priority {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.println("    ----------------------------------------------");
        System.out.println("\t Penjadwalan CPU - Priority");
        System.out.println("    ----------------------------------------------");
        System.out.print("\n Jumlah Proses : ");
        int n = input.nextInt();

        int[] aTime = new int[n];
        int[] bTime = new int[n];
        int[] process = new int[n];
        int[] prio = new int[n];

        for(int i=0;i<n;i++) {
            process[i]=i+1;
            System.out.print("\n P["+(i+1)+"] ->");
            System.out.print(" Arrival time : ");
            aTime[i] = input.nextInt();
            System.out.print("         Burst time   : ");
            bTime[i] = input.nextInt();
            System.out.print("         Priority     : ");
            prio[i] = input.nextInt();
        }

        int aTemp, bTemp, pTemp, prTemp;
        for(int i=0;i<n;i++){
            for(int j=0;j<n-1;j++){
                if(aTime[j]>aTime[j+1]){
                    pTemp = process[j];
                    process[j] = process[j+1];
                    process[j+1] = pTemp;

                    aTemp = aTime[j];
                    aTime[j] = aTime[j+1];
                    aTime[j+1] = aTemp;

                    bTemp = bTime[j];
                    bTime[j] = bTime[j+1];
                    bTime[j+1] = bTemp;

                    prTemp = prio[j];
                    prio[j] = prio[j+1];
                    prio[j+1] = prTemp;
                }
            }
        }

        for(int i=0;i<n;i++){
            for(int j=1;j<n-1;j++){
                if(prio[j]>prio[j+1]){
                    pTemp = process[j];
                    process[j] = process[j+1];
                    process[j+1] = pTemp;

                    aTemp = aTime[j];
                    aTime[j] = aTime[j+1];
                    aTime[j+1] = aTemp;

                    bTemp = bTime[j];
                    bTime[j] = bTime[j+1];
                    bTime[j+1] = bTemp;

                    prTemp = prio[j];
                    prio[j] = prio[j+1];
                    prio[j+1] = prTemp;
                }
            }
        }


        float wTime = 0;
        int tTime = 0;
        float wTot = 0;

        tTime=aTime[0];
        System.out.println("\n  -----------------------------------------------");
        System.out.println("  |   Process\t|   Start Time \t|   Stop Time\t|");
        System.out.println("  -----------------------------------------------");

        for (int i=0;i<n;i++) {
            System.out.println("  |\tP"+process[i]+"\t|\t"+tTime+" \t|\t "+(tTime+bTime[i])+"\t|");
            if (i == n-1) continue;
            tTime += bTime[i];
            wTime = tTime - aTime[i+1];
            wTot += wTime;
        }
        System.out.println("  -----------------------------------------------------------------------");
        float avg = wTot / n;
        System.out.println("\n -> Average waiting time : "+avg);
        System.out.println("");
        System.out.println("  -----------------------------------------------------------------------");
        System.out.println("\nGannt Chart");
        tTime = aTime[0];
        int h = 22;
        try{
            for(int i=0;i<=n;i++) {
                System.out.print(tTime);
                for(int j=1;j<=bTime[i];j++) {
                    if(i == n) break;
                    System.out.printf("%c",h);
                }
                tTime += bTime[i];
            }
        }catch (Exception e){
            System.out.println("");
            System.exit(0);
        }

    }
}