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priority.c
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priority.c
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#include<stdio.h>
void main()
{
int i,j,n,pos=0,temp=0,wt[50],bt[50],tat[50],pr[50],p[50],totalwt=0,totaltat=0;
printf("Enter no: of processes:");
scanf("%d",&n);
printf("Enter burst time:\n");
for(i=0;i<n;i++)
{
printf("P%d:",i+1);
scanf("%d",&bt[i]);
p[i]=i+1;
}
printf("Enter priority:\n");
for(i=0;i<n;i++)
{
printf("P%d:",i+1);
scanf("%d",&pr[i]);
}
for(i=0;i<n;i++)
{
pos=i;
for(j=i+1;j<n;j++)
{
if(pr[j]<pr[pos])
pos=j;
}
temp=bt[i];
bt[i]=bt[pos];
bt[pos]=temp;
temp=pr[i];
pr[i]=pr[pos];
pr[pos]=temp;
temp=p[i];
p[i]=p[pos];
p[pos]=temp;
}
wt[0]=0;
for(i=1;i<n;i++)
wt[i]=wt[i-1]+bt[i-1];
for(i=0;i<n;i++)
tat[i]=wt[i]+bt[i];
printf("Processes\tPriority\tBurst time\tWaiting time\tTurnaround time\n");
for(i=0;i<n;i++)
{
printf("%d\t\t%d\t\t%d\t\t%d\t\t%d\n",p[i],pr[i],bt[i],wt[i],tat[i]);
totalwt+=wt[i];
totaltat+=tat[i];
}
printf("Average waiting time=%f",(float)totalwt/n);
printf("\nAverage turnaround time=%f",(float)totaltat/n);
}