C Program For Round Robin Scheduling Method
C Program For Round Robin Scheduling Method
#include<stdio.h>
#include<conio.h>
int z[10],b[10],n,m[50],r,q,e=0,avg=0,i,j;
float f;
main()
{
clrscr();
printf("\n\tJOB SCHEDULING ALGORITHM[RR]");
printf("\n\t*******************************************************\n");
printf("\nEnter how many jobs:");
scanf("%d",&n);
printf("\nEnter burst time for corresponding job...\n");
for(i=1;i<=n;i++)
{
printf("\nProcess %d: ",i);
scanf("%d",&b[i]); z[i]=b[i];
}
printf("\nENTER THE TIME SLICE VALUE:");
scanf("%d",&q);
rr();
average();
getch();
return 0;
}
rr()
{
int max=0;
max=b[1];
for(j=1;j<=n;j++)
if(max<=b[j])
max=b[j];
if((max%q)==0)
r=(max/q);
else
r=(max/q)+1;
for(i=1;i<=r;i++)
{
printf("\nround %d",i);
for(j=1;j<=n;j++)
{
if(b[j]>0)
{
b[j]=b[j]-q;
if(b[j]<=0)
{
b[j]=0;
printf("\nprocess %d is completed",j);
}
else
printf("\nprocess %d remaining time is %d",j,b[j]);
}
}
delay(1000);
}
return 0;
}
average()
{
for(i=1;i<=n;i++)
{
e=0;
for(j=1;j<=r;j++)
{
if(z[i]!=0)
{
if(z[i]>=q)
{
m[i+e]=q; z[i]-=q;
}
else
{
m[i+e]=z[i]; z[i]=0;
}
}
else
m[i+e]=0;
e=e+n;
}
}
for(i=2;i<=n;i++)
for(j=1;j<=i-1;j++)
avg=avg+m[j];
for(i=n+1;i<=r*n;i++)
{
if(m[i]!=0)
{
for(j=i-(n-1);j<=i-1;j++)
avg=m[j]+avg;
}
}
f=avg/n;
printf("\nTOTAL WATING:%d",avg);
printf("\n\nAVERAGE WAITING TIME:%f\n",f);
for(i=1;i<=r*n;i++)
{ if(m[i]!=0)
if(i%n==0){
printf("P%d",(i%n)+(n)); }
else
printf("P%d",(i%n));
for(j=1;j<=m[i];j++)
printf("%c",22);
}
printf("\n");
getch();
return 0;
}
Enter how many jobs:4
Enter burst time for corresponding job...
Process 1: 7
Process 2: 5
Process 3: 4
Process 4: 2
ENTER THE TIME SLICE VALUE:2
round 1
process 1 remaining time is 5
process 2 remaining time is 3
process 3 remaining time is 2
process 4 is completed
round 2
process 1 remaining time is 3
process 2 remaining time is 1
process 3 is completed
round 3
process 1 remaining time is 1
process 2 is completed
round 4
process 1 is completed
TOTAL WATING:39
AVERAGE WAITING TIME:9.000000
P1▬▬P2▬▬P3▬▬P4▬▬P1▬▬P2▬▬P3▬▬P1▬▬P2▬P1▬
