63 Responses to “C program for SJF CPU Scheduling Algorithm”

1. skipliza says:

   November 5, 2011 at 12:06 pm

   Hello sir,
   I have seen the code but I dont have a clue how I can run or where do I save it?please tell me how to save and run this program..
2. bharti says:

   November 8, 2011 at 11:13 pm

   can any one tell me plz wht is tis jpt[j] in the above program.i will b highly grateful!!!!!!!!!!!!!!!
3. chaitanya says:

   November 17, 2011 at 3:56 pm

   thanks for u
   for giving
   this type of programms
   bt this are static arrival times of proceeossrs
   if some processor comes dynamically with some arrival time
   ?????
4. preetam says:

   December 4, 2011 at 5:23 pm

   Can any1 help me wid c code for multilevel round roubin scheduling pls???
5. Ivan says:

   December 12, 2011 at 6:10 pm

   Fucking syntax errors . don’t know how to fix it .
6. murali krishna says:

   December 31, 2011 at 10:19 am

   i want all cpu scheduling algorithms with programmes
   tell me any site
   but remeber one thing i want small programmes
7. sri says:

   February 6, 2012 at 8:13 pm

   plz do try 2 post codes for preemptive scheduling also
8. amey says:

   February 22, 2012 at 8:27 pm

   please upload pre-emptive algorithms pgm-fcfs,srtf,rr,priority
9. Tamie Caffarelli says:

   March 12, 2012 at 7:34 pm

   Business, that’s easily defined – it’s other people’s money.
   Individuals will buy anything that is ‘one to a customer.’
10. Ravi Kumar says:

    March 14, 2012 at 6:46 am

    b) SJF:
    AIM: A program to simulate the SJF CPU scheduling algorithm
    PROGRAM:
    #include
    #include
    #include
    void main()
    {
    int et[20],at[10],n,i,j,temp,st[10],ft[10],wt[10],ta[10];
    int totwt=0,totta=0;
    float awt,ata;
    char pn[10][10],t[10];
    clrscr();
    printf(“Enter the number of process:”);
    scanf(“%d”,&n);
    for(i=0;i<n;i++)
    {
    printf("Enter process name, arrival time & execution time:");
    flushall();
    scanf("%s%d%d",pn[i],&at[i],&et[i]);
    }
    for(i=0;i<n;i++)
    for(j=0;j<n;j++)
    {
    if(et[i]<et[j])
    {
    temp=at[i];
    at[i]=at[j];
    at[j]=temp;
    temp=et[i];
    et[i]=et[j];
    et[j]=temp;
    strcpy(t,pn[i]);
    strcpy(pn[i],pn[j]);
    strcpy(pn[j],t);
    }
    }
    for(i=0;i<n;i++)
    {
    if(i==0)
    st[i]=at[i];
    else
    6
    st[i]=ft[i-1];
    OS Lab Manual K. Ravi Chythanya
    wt[i]=st[i]-at[i];
    ft[i]=st[i]+et[i];
    ta[i]=ft[i]-at[i];
    totwt+=wt[i];
    totta+=ta[i];
    }
    awt=(float)totwt/n;
    ata=(float)totta/n;
    printf("\nPname\tarrivaltime\texecutiontime\twaitingtime\ttatime");
    for(i=0;i<n;i++)
    printf("\n%s\t%5d\t\t%5d\t\t%5d\t\t%5d",pn[i],at[i],et[i],wt[i],ta[i]);
    printf("\nAverage waiting time is:%f",awt);
    printf("\nAverage turnaroundtime is:%f",ata);
    getch();
    }
    OUTPUT:
    Input:
    Enter the number of processes: 3
    Enter the Process Name, Arrival Time & Burst Time: 1 4 6
    Enter the Process Name, Arrival Time & Burst Time: 2 5 15
    Enter the Process Name, Arrival Time & Burst Time: 3 6 11
    Output:
    Pname arrivaltime executiontime waitingtime tatime
    1 4 6 0 6
    3 6 11 4 15
    2 5 15 16 31
    Average Waiting Time: 6.6667
    Average Turn Around Time: 17.3333
11. msgd says:

    March 15, 2012 at 2:55 pm

    import java.awt.*;
    import java.applet.*;
    public class UserIn extends Applet
    {
    TextField text1, text2;
    public void init()
    {
    Label lob1=new Label();
    Label lob2=new Label();
    Label lob3=new Label();
    Label lob4=new Label();
    Label lob5=new Label();
    Label lob6=new Label();
    Label lob7=new Label();
    Label lob8=new Label();
    Label lob9=new Label();
    lob1.setText(“BE”);
    lob2.setText(“ES”);
    lob3.setText(“DMS”);
    lob4.setText(“DS”);
    lob5.setText(“PSQT”);
    lob6.setText(“FDL”);
    lob7.setText(“DS LAB”);
    lob8.setText(“BE LAB”);
    lob9.setText(“ECS LAB”);
    text1=new TextField(8);
    text2=new TextField(8);
    add(lob1);
    add (text1);
    add(lob2);
    add (text2);
    text1.setText (“0″);
    text2.setText (“0″);
    }
    public void paint(Graphics g)
    {
    int x=0, y=0, z=0;
    String s1=null, s2=null, s=null;
    g.drawString(“Input a number in each box”,10,45);
    try
    {
    s1=text1.getText();
    x= Integer.parseInt(s1);
    s2=text2.getText();
    y= Integer.parseInt(s2);
    }
    catch (Exception ex) { System.out.println(ex);}
    z= x + y;
    s=String.valueOf(z);
    g.drawString (“The Sum is: “+s,10,75);
    }
    public boolean action (Event event, Object object)
    {
    repaint ();
    return true;
    }
    }
12. kj says:

    March 15, 2012 at 3:14 pm

    import java.io.*;
    import java.awt.*;
    import java.applet.*;

    public class Scorebar extends Applet
    {
    int sri[]={3,3,1,4,6,2,9,1,0,3,8,7,8,3,5,1,10,2,3,0,5,8,2,5,6,11,3,7,7,4,5,6,4,5,11,4,3,6,3,2,2,1,2,4,3,9,4,9,12,4};
    int ind[]={2,4,7,6,4,1,2,8,8,2,3,2,7,5,7,5,6,0,3,1,10,1,3,5,1,6,5,8,4,9,2,3,3,4,8,2,5,7,4,5,0,2,2,4,5,13,5,4,15,4};

    public void init()
    {

    }
    public void paint(Graphics g)
    {
    try
    {
    int j=-5;
    for(int i=0;i<50;i++)
    {
    g.setColor(Color.red);
    g.fillRect(j+5,200,5,sri[i]*10);
    g.setColor(Color.blue);
    j=j+5;
    g.fillRect(j+5,200,5,ind[i]*10);
    j=j+5;
    }
    }catch(Exception e){}
    }
    }
13. Jyoti says:

    March 28, 2012 at 9:54 am

    Thank u very much for ur programs. It helped me a lot in my OS subject….
    Thank u………..

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