PRIORITY.c

#include<stdio.h>

int p[30],bt[30],tot_tat=0,pr[30],wt[30],n,tot_wt=0,tat[30],PR_wt=0,PR_tat=0;

float awt,avg_tat,avg_wt;

void main()

{

int i;

printf("\nEnter the no.of processes \n");

scanf("%d",&n);

for(i=0;i<n;i++)

{

printf("Enter burst time and priority of process[%d]:",i+1);

scanf("%d%d",&bt[i],&pr[i]);

p[i] = i;

}

sort();

WT_TAT(&PR_tat,&PR_wt);

printf("\n\nTotal Turn around Time:%d",PR_tat);

printf("\nAverage Turn around Time :%d ", PR_tat/n);

printf("\nTotal Waiting Time:%d",PR_wt);

printf("\nTotal avg. Waiting Time:%d\n\n",PR_wt/n);

}

int sort()

{

int t,i,j,t2,t1;

for(i=0;i<n;i++)

{

for(j=i+1;j<n;j++)

{

if(pr[i]>pr[j])

{

swap(&bt[j],&bt[i]);

swap(&p[j],&p[i]);

swap(&pr[j],&pr[i]);

}

}

}

return 0;

}

int swap(int *a, int *b)

{

int t;

t = *a;

*a = *b;

*b = t;

return 0;

}

int WT_TAT(int *a, int *b)

{

int i;

for(i=0;i<n;i++)

{

if(i==0)

tat[i] = bt[i];

else

tat[i] = tat[i-1] + bt[i];

tot_tat=tot_tat+tat[i];

}

*a = tot_tat;

wt[0]=0;

for(i=1;i<n;i++)

{

wt[i]=wt[i-1]+bt[i-1];

tot_wt = tot_wt+wt[i];

}

*b = tot_wt;

printf("\nPROCESS\t\tBURST TIME\tPRIORITY\tTURN AROUND TIME\tWAITING TIME");

for(i=0; i<n; i++)

printf("\nprocess[%d]\t\t%d\t\t%d\t\t%d\t\t%d",p[i]+1,bt[i],pr[i],tat[i],wt[i]);

return 0;

}