OS_Q2

#include<stdio.h>
#include<stdlib.h>
#include<conio.h> 
 
int main() 
{  
  int count,i,j,m=0,n,y=0,time,remain=0,min,flag=0; 
  int wait_time=0,turn_a_time=0,a_time[10],b_time[10],p[10],z[10];
  float k=0,x=0; 
  printf("Enter number of Process:\t "); 
  scanf("%d",&n); 
  printf("\n\tArrival time should be greater than 2 as CPU remains idle for first 3 secs.\n");
  printf("\n\tBurst time should be less tha 10\n");
  for(count=0;count<n;count++) 
  { 
    printf("Enter Arrival Time and Burst Time for Process Number %d :",count+1); 
    scanf("%d",&a_time[count]); 
    scanf("%d",&b_time[count]);  
  } 
for(i=0;i<n;i++)
{	if(a_time[i]==0)
	{		printf("\nS INVALID ARRIVAL TIME\n");
		getch();
		exit(1);
	}
}
for(i=0;i<n;i++)
{	if(a_time[i]<3)
	{	printf("\nS INVALID Arrival Time it should be greater than 3\n");
		getch();
		exit(1);
	}
}
  printf("\n\n\tPROCESS\t|        TAT     |Waiting Time\n"); 
  printf("\t-----------------------------------------\n");
for(i=0;i<n;i++)
{
	m=m+b_time[i];
}
min=m;
time=m;
for(i=0;i<n;i++)
{	if(a_time[i]<time)
	{
		time=a_time[i];
	}
}
for(i=time;i<=m;i=i+b_time[j])
{	min=m;
	remain=0;
	flag=0;

	for(count=0;count<n;count++)
	{
		if(a_time[count]<=i)
		{
			if(b_time[count]<min)
			{
				min = b_time[count];
				j=count;
				flag=1;
			}
			remain=1;	 
		}
	}
	if(flag==1&&remain==1)
	{
		wait_time=i-a_time[j];
		turn_a_time=wait_time+b_time[j];
		printf("\tP[%d]\t|\t%d\t|\t%d\n",j+1,turn_a_time,wait_time); 
		k=k+wait_time;
		x=x+turn_a_time;
	
		a_time[j]=m+1;
		p[y]=j+1;
		z[y]=i;
		y++;
	}
}
printf("\n\nAVERAGE WAITING TIME= %.2f\n",k/n); 
printf("AVERAGE TURNAROUND TIME = %.2f",x/n); 
printf("\n\n\nTOTAL TIME TAKEN BY PROCESSOR TO COMPLETE ALL JOBS: %d",m);  
printf("\n\nQUEUE::ORDER OF EXECUTION:\n");
printf("\nPROCESS		");

for(i=0;i<n;i++)
{
	printf(" P[%d]   ",p[i]);
	if(i==(n-1))
	{
		printf("End");
	}
}


  return 0; 
}