-
Notifications
You must be signed in to change notification settings - Fork 2
/
Priority_P.cpp
68 lines (62 loc) · 1.94 KB
/
Priority_P.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
#include<iostream>
using namespace std;
int min(int burstTime[],int arrivalTime[], int priority[], int current)
{
int min = 0;
for(int i=1;i<4;i++)
{
if(burstTime[min] == 0)
min = i;
if(priority[i] < priority[min] && current >= arrivalTime[i] && burstTime[i]!=0)
min = i;
}
return min;
}
void incWaitTime(int index,int current, int waitTime[], int arrivalTime[], int burstTime[])
{
for(int i=0;i<4;i++)
{
if(i!=index && current>=arrivalTime[i] && burstTime[i]>0)
waitTime[i]++;
}
}
void display(int burstTime[], int arrivalTime[], int waitTime[], int turnaroundTime[], int priority[])
{
cout<<"PID\tPriority\tBurst Time\tArrival Time\tWait Time\tTurnaround Time\n";
for(int i=0;i<4;i++)
cout<<"P"<<i<<"\t"<<priority[i]<<"\t\t"<<burstTime[i]<<"\t\t"<<arrivalTime[i]<<"\t\t"<<waitTime[i]<<"\t\t"<<turnaroundTime[i]<<'\n';
}
void prioritySched(int burstTime[], int waitTime[], int arrivalTime[], int turnaroundTime[], int priority[], int totalBurst)
{
int index, tempBurstTime[4];
for(int i=0;i<4;i++)
tempBurstTime[i] = burstTime[i];
index = min(tempBurstTime, arrivalTime, priority, 0);
for (int i=0;i<=totalBurst;i++)
{
if(tempBurstTime[index] == 0)
index = min(tempBurstTime, arrivalTime, priority, i);
tempBurstTime[index]--;
incWaitTime(index, i, waitTime, arrivalTime, tempBurstTime);
}
for(int i=0;i<4;i++)
turnaroundTime[i] = waitTime[i] + burstTime[i];
display(burstTime, arrivalTime, waitTime, turnaroundTime, priority);
}
int main()
{
int burstTime[4], arrivalTime[4], waitTime[4], turnaroundTime[4], priority[4], totalBurst=0;
for(int i=0;i<4;i++)
{
cout<<"Enter burst time of process P"<<i<<" : ";
cin>>burstTime[i];
totalBurst += burstTime[i];
cout<<"Enter arrival time of process P"<<i<<" : ";
cin>>arrivalTime[i];
cout<<"Enter priority of process P"<<i<<" : ";
cin>>priority[i];
waitTime[i]=0;
}
prioritySched(burstTime, waitTime, arrivalTime, turnaroundTime, priority, totalBurst);
return 0;
}