FCFS SCHEDULING ALG

/* FCFS */
#include<stdio.h>
main()
{
int a[10],b[10],p[10],wr[10],rr[10],f[10],w[10],r[10],ta[10];
int i,n,sw,sr,sta;
float aw,ar,ata;
printf("enter no of processes: ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("enter burst time for p %d: ",i+1);
scanf("%d",&b[i]);
printf("enter arrival time for p %d: ",i+1);
scanf("%d",&a[i]);
p[i]=i+1;
}
wr[0]=rr[0]=a[0];
f[0]=b[0]+a[0];
for(i=1;i<n;i++)
{
wr[i]=wr[i-1]+b[i-1];
rr[i]=rr[i-1]+b[i-1];
f[i]=f[i-1]+b[i];
}
for(i=0;i<n;i++)
{
w[i]=wr[i]-a[i];
r[i]=rr[i]-a[i];
ta[i]=f[i]-a[i];
}
sw=sr=sta=0;
for(i=0;i<n;i++)
{
sw+=w[i];
sr+=r[i];
sta+=ta[i];
}
aw=sw/(float)n;
ar=sr/(float)n;
ata=sta/(float)n;
printf("process burst time arrival time waiting time response time turn raound time \n");
for(i=0;i<n;i++)
{
printf("p %d",p[i]);
printf("\t \t %d",b[i]);
printf("\t \t %d",a[i]);
printf("\t \t %d",w[i]);
printf("\t \t %d",r[i]);
printf("\t \t %d",ta[i]);
printf("\n");
}
printf("average waiting time = %f \n",aw);
printf("average response time = %f \n",ar);
printf("average turn around time = %f \n",ata);
}