Priority Process Scheduling Algorithm In C Program

#include< stdio.h>
#include< conio.h>
void main()
{
 int
njob,pID[15],aTime[15],bTime[15],jcTime[15],taTime[15],wTime[15],i,j,temp,sTime[15],prior[15];
 float totalWait,totalTA;
 clrscr();

 printf("\n Enter number of process:");
 scanf("%d",&njob);

 for(i=0;i< njob;i++)
 {
  printf("\n Enter the Arrival time , Burst time and Priority for process[%d]:",i+1);
  scanf("%d %d %d",&aTime[i],&bTime[i],&prior[i]);

  pID[i]=i+1;
 }

 for(i=0;i< njob;i++)
 {
  for(j=i+1;j< njob;j++)
  {
   if(prior[i]>prior[j])
   {
    temp=pID[i];
    pID[i]=pID[j];
    pID[j]=temp;

    temp=aTime[i];
    aTime[i]=aTime[j];
    aTime[j]=temp;

    temp=bTime[i];
    bTime[i]=bTime[j];
    bTime[j]=temp;

    temp=prior[i];
    prior[i]=prior[j];
    prior[j]=temp;
   }
  }
 }
 for(i=0;i< njob;i++)
 {
  if(i==0)
  {
   sTime[0]=aTime[i];
  }
  else
  {
   sTime[i]=jcTime[i-1];

  }

  jcTime[i]=sTime[i]+bTime[i];
  taTime[i] = jcTime[i]-aTime[i];
  wTime[i] = taTime[i] - bTime[i];

 }

 printf("\n Process ArrivalTime   BurstTime  Priority   TurnaroundTime   WaitingTime");
 printf("\n_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+");

 for(i=0;i< njob;i++)
 {
  printf("\n %d \t\t    %d \t   %d    \t %d",pID[i],aTime[i],bTime[i],prior[i]);
  printf("\t\t %d",taTime[i]);
  printf("\t\t %d",wTime[i]);

  totalTA=totalTA+taTime[i];
  totalWait=totalWait+wTime[i];
 }
 printf("\n_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+");

 printf("\n total waiting time:%.2f",totalWait/njob);
 printf("\n total turn around time:%.2f",totalTA/njob);

getch();
}


OUTPUT

Enter number of process:5

 Enter the Arrival time , Burst time and Priority for process[1]:0 10 3

 Enter the Arrival time , Burst time and Priority for process[2]:0 6 5

 Enter the Arrival time , Burst time and Priority for process[3]:0 2 2

 Enter the Arrival time , Burst time and Priority for process[4]:0 4 1

 Enter the Arrival time , Burst time and Priority for process[5]:0 8 4

Process ArrivalTime   BurstTime  Priority   TurnaroundTime   WaitingTime
_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+
 4         0             4          1            4               0
 3         0             2          2            6               4
 1         0            10          3           16               6
 5         0             8          4           24               16
 2         0             6          5           30               24
_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+
 total waiting time:10.00
 total turn around time:16.00