ROUND ROBIN OS C PROGRAM

/*CSEMATTERBLOG
PROGARM TO IMPLEMENT ROUND ROBIN ALGO*/
#include<stdio.h>
#include<conio.h>
int main()
{
    int bt[20],gc[20],wt[20],tat[20],bt1[20],st[20],ts,n,i,j,k,count=0,count1,sum_bt=0,tq;
    int swt=0,stat=0,temp,sq=0,c,p=0;
float awt=0.0,atat=0.0;
    printf("Enter the nuo. of processs");
    scanf("%d",&n);
    printf("Enter the burst time");
    for(i=0; i<n; i++)
        {scanf("%d",&bt[i]);
        bt1[i]=bt[i];
        st[i]=bt[i];}
    printf("Enter the time slice");
    scanf("%d",&ts);
    tq=ts;
    for(i=0; i<n; i++)
    sum_bt=sum_bt+bt[i];
        for(k=0; k<n; k++)
    {
       do
        {
            for(i=0; i<n; i++)
            {
                if(bt[i]>=ts)
                {
                    for(j=count; j<(count+ts); j++)
                        gc[j]=i+1;
                    count+=ts;
                    bt[i]=bt[i]-ts;
                }
                else
                {
                    for(j=count; j<=(count+bt[i]); j++)
                        gc[j]=i+1;
                    count+=bt[i];
                    bt[i]=0;
                }
            }
        }while(bt[k]!=0);
    }

 while(1)
{
       for(i=0,count=0;i<n;i++)
       {
       temp=tq;
       if(st[i]==0)
      {
        count++;
        continue;
       }
if(st[i]>tq)
st[i]=st[i]-tq;
else
if(st[i]>=0)
{
temp=st[i];
st[i]=0;
}
sq=sq+temp;
tat[i]=sq;
}
if(n==count)
break;
}
for(i=0;i<n;i++)
{
wt[i]=tat[i]-bt1[i];
swt=swt+wt[i];
stat=stat+tat[i];
}
awt=(float)swt/n;
atat=(float)stat/n;
printf("Process_no Burst time Wait time Turn around time\n");
for(i=0;i<n;i++)
printf("%d %d %d %d\n",i+1,bt1[i],wt[i],tat[i]);
printf("Avg wait time is %f Avg turn around time is %f",awt,atat);
 printf("\n \n");
    printf("GANTT CHART: \n");
    c=gc[0];
    printf("  ||P%d\t",gc[0]);
    for(i=1;i<sum_bt;i++)
    {
        if(gc[i]!=c)
        {printf(" ||P%d|| ",gc[i]);
        c=gc[i];}
    }
    printf("\n0\t");
    c=gc[0];
    for(i=1;i<=sum_bt;i++)
    {    p=p+1;
         if(gc[i]!=c)
        {printf("%d \t",p);
        c=gc[i];
        }}
   getch();
}
/*OUTPUT:
Enter the no. of proceses 5
Enter the burst time of processes
5   1   2   2   3
Enter the time slice 2
Process  Burst Time   Waiting Time Turn AroundTime
1           5           8               13
2           1           2               3
3           2           3               5
4           2           5               7
5           3           9               12
GANTT CHART:
  ||P1||    ||P2||  ||P3||  ||P4||  ||P5||  ||P1||  ||P5||  ||P1||
0        2        3        5      7       9       11      12      13*/