I have an assignment for a class that needs me to implement FCFS I have the foll
ID: 3928990 • Letter: I
Question
I have an assignment for a class that needs me to implement FCFS
I have the following data, I need some help setting this up
P1 {4,24,5,73,3,31,5,27,4,33,6,43,4,64,5,19,2}
P2 {18,31,19,35,11,42,18,43,19,47,18,43,17,51,19,32,10}
P3 {6,18,4,21,7,19,4,16,5,29,7,21,8,22,6,24,5}
P4 {17,42,19,55,20,54,17,52,15,67,12,72,15,66,14}
P5 {5,81,4,82,5,71,3,61,5,62,4,51,3,77,4,61,3,42,5}
P6 {10,35,12,41,14,33,11,32,15,41,13,29,11}
P7 {21,51,23,53,24,61,22,31,21,43,20}
P8 {11,52,14,42,15,31,17,21,16,43,12,31,13,32,15}
Heres what I was thinking
struct process
{
public int[] process_size;
public string[] process_id;
public int[] arrival;
public int[] cpu_burst;
public int[] input_output_burst;
public double[] wait;
public double [] turnaround_time;
public double []responsetime;
}
void initialize_process ()
{
process p = new process();
p.process_size = new int[8];
//ARRIVAL TIMES
p.arrival = new int[] { 4, 18, 6, 17, 5, 10, 21, 11};
//initializes the id name
p.process_id= new string[] {"P1","P2","P3","P4","P5","P6","P7","P8"};
//CPU BURSTS
p.cpu_burst = new int[] { 38, 149, 52, 129, 41, 86, 131, 113};
//I/O BURSTS
p.input_output_burst = new int[] { 314, 324, 170, 408, 588, 211, 239, 252 };
FCFS(p);
}
void FCFS(process p)
{
double average_wait;
double average_turnaround_time;
double average_response_time;
}
public Form1()
{
InitializeComponent();
}
private void calculate_Click(object sender, EventArgs e)
{
initialize_process();
//FCFS();
}
Explanation / Answer
Hope this will help-
#include<iostream>
using namespace std;
int main()
{
int n,bt[20],wt[20],tat[20],avwt=0,avtat=0,i,j;
cout<<"Enter total number of processes(maximum 20):";
cin>>n;
cout<<" Enter Process Burst Time ";
for(i=0;i<n;i++)
{
cout<<"P["<<i+1<<"]:";
cin>>bt[i];
}
wt[0]=0; //waiting time for first process is 0
//calculating waiting time
for(i=1;i<n;i++)
{
wt[i]=0;
for(j=0;j<i;j++)
wt[i]+=bt[j];
}
cout<<" Process Burst Time Waiting Time Turnaround Time";
//calculating turnaround time
for(i=0;i<n;i++)
{
tat[i]=bt[i]+wt[i];
avwt+=wt[i];
avtat+=tat[i];
cout<<" P["<<i+1<<"]"<<" "<<bt[i]<<" "<<wt[i]<<" "<<tat[i];
}
avwt/=i;
avtat/=i;
cout<<" Average Waiting Time:"<<avwt;
cout<<" Average Turnaround Time:"<<avtat;
return 0;
}
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