MultiLevelQueueScheduling.cpp

#include<stdio.h>
int main()
{
	int p[20],bt[20], su[20], wt[20],tat[20],i, k, n, temp;
	float wtavg, tatavg;
	printf("Enter the number of processes:");
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		p[i] = i;
		printf("Enter the Burst Time of Process%d:", i);
		scanf("%d",&bt[i]);
		printf("System/User Process (0/1) ? ");
		scanf("%d", &su[i]);
	}
	for(i=0;i<n;i++)
		for(k=i+1;k<n;k++)
			if(su[i] > su[k])
			{
			temp=p[i];
			p[i]=p[k];
			p[k]=temp;
			temp=bt[i];
			bt[i]=bt[k];
			bt[k]=temp;
			temp=su[i];
			su[i]=su[k];
			su[k]=temp;
			}
	wtavg = wt[0] = 0;
	tatavg = tat[0] = bt[0];
	for(i=1;i<n;i++)
	{
		wt[i] = wt[i-1] + bt[i-1];
		tat[i] = tat[i-1] + bt[i];
		wtavg = wtavg + wt[i];
		tatavg = tatavg + tat[i];
	}
	printf("\nPROCESS\t\t SYSTEM/USER PROCESS \tBURST TIME\tWAITING TIME\tTURNAROUND TIME");
	for(i=0;i<n;i++)
		printf("\n%d \t\t %d \t\t %d \t\t %d \t\t %d ",p[i],su[i],bt[i],wt[i],tat[i]);
	printf("\nAverage Waiting Time is --- %f",wtavg/n);
	printf("\nAverage Turnaround Time is --- %f",tatavg/n);
	return 0;
}