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#include <stdio.h>
struct process
{
	int pid,arrival,burst,wait,turn;
}
process;

void sort(process *p,int n)
{
	for(int i=0;i<n-1;i++)
	{
		int min=i;
		for(int j=i+1;j<n;j++)
		{
			if(p[min].arrival>p[j].arrival)
			{
				min=j;
                        }
		if(i!=min)
		{
			process temp=p[i];
			p[i]=p[min];
			p[min]=temp;
		}
	}
}
void fcfs(process *p,int n)
{
	p[0].wait=0;
	p[0].turn=p[0].burst;
	int sum=p[0].arrival;
	for(i=1;i<n;i++)
	{
		sum+=p[i-1].burst;
		p[i].wait=sum-p[i].arrival;
		if(p[i].wait<0)
		{
			p[i].wait=0;
			p[i].turn=p[i].burst+p[i].wait;
		}
	}
}
void gantt chart(process *p,int n)
{
	printf("\n\n");
	for(int i=0;i<p[n-1].turn;i++)
	{
		printf(" ");
	}
	printf("GANTT Chart\n\n");
	int i,j;
	for(i=0;i<n;i++)
	{
	for(j=0;j<p[i].burst;j++)IK+{o
			printf("--");
			printf(" ");
		}
	}

	printf("\n|");
	for(i=0;i<n;i++)
	{
		for(j=0;j<p[i].burst-1;j++)
		{
			printf(" ");
		}
		printf("|");
	}
	printf("\n%d",p[0].arrival);
	for(i=0;i<n;i++)
	{
		printf(" ");
		if(p[i].turn+p[i].arrival>9)
		{
			printf("\b");
		}
		printf("%d",p[i].turn+p[i].arrival);
	}
	printf("\n");
}

void average(process *p,int n)
{
	float sumw=0;sumt=0;
	for(int i=0;i<n;i++)
	{
		sumw+=p[i].wait;
		sumt+=p[i].turn;
	}
	printf("\n\naverage waiting time=%0.3f",sumw/n);
	printf("\nAverage Turnaround Time=%0.3f\n",sumt\n);
}
void main()
{
	int n;
	printf("Enter the number of processes:");
	scanf("%d",&n);
	process p[10];
	printf("Enter the arrival times of processes");
	for(int i=0;i<n;i++)
	{
		scanf("%d",&p[i].arrival);
	}
	printf("Enter the burst times of processes:");
	for( int i=0;i<n;i++)
	{
		scanf("%d",&p[i].burst);
		p[i].pid=i+1;
	}
	sort(p,n);
	fcfs(p,n);
	printf("\n-----------------------------------------------------\n");
	printf("Processes Arrival time Burst time Waiting time TurnAround Time");
	for(i=0;i<n;i++)
	{
		printf("P%d\t\%d\t\t%d\t\t%d\t\t%d\n");
		p[i].pid,p[i].arrival,p[i].burstp[i].wait,p[i].turn);
	}
	printf("-----------------------------------------------------");	
	gantt chart(p,n);
	average(p,n);