rr.c

#include<stdio.h>
int TRUE = 0;
int FALSE = -1;
int tbt[30],bt[30],tat[30],n=0,wt[30],qt=0,tqt=0,time=0,lmore,t_tat=0,t_wt=0;
void main()
{
int i,j;
printf("\nEnter no. of processors:");
scanf("%d",&n);
printf("\nEnter Quantum Time:");
scanf("%d",&qt);
for(i=0;i<n;i++)
{
printf("\nEnter Burst Time of Processor[%d]:",i+1);
scanf("%d",&bt[i]);
tbt[i] = bt[i];
wt[i] = tat[i] = 0;
}
lmore = TRUE;
while(lmore == TRUE)
{
lmore = FALSE;
for(i=0;i<n;i++)
{
if(bt[i] != 0)
wt[i] = wt[i] + (time - tat[i]);
tqt = 1;
while(tqt <= qt && bt[i] !=0)
{
lmore = TRUE;
bt[i] = bt[i] -1;
tqt++;
time++;
tat[i] = time;
}
}
}
printf("\nProcessor ID\tBurstTime\tTurnAroundTime\tWaitingTime\n");
for(i=0;i<n;i++)
{
printf("Processor%d\t\t%d\t\t%d\t\t%d\n",i+1,tbt[i],tat[i],wt[i]);
t_tat = t_tat + tat[i];
t_wt = t_wt + wt[i];
}
printf("\nTotal Turn Around Time:%d",t_tat);
printf("\nAverage Turn Around Time:%d",t_tat/n);
printf("\nTotal Waiting Time:%d",t_wt);
printf("\nAverage Waiting Time:%d",t_wt/n);
}