priority CPU scheduling algorithm (Win)

priority_win.c

// Run VS dev terminal: start button -> serch "dev" -> start VS developer terminal
// Compile with: cl priority_win.c
// http://www.ssau.ru/files/education/metod_1/%D0%9A%D1%83%D0%BF%D1%80%D0%B8%D1%8F%D0%BD%D0%BE%D0%B2%20%D0%90.%D0%92.%20%D0%90%D0%BB%D0%B3%D0%BE%D1%80%D0%B8%D1%82%D0%BC%D1%8B%20%D0%BF%D0%BB%D0%B0%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.pdf

#include<stdio.h>

int main()
{
	int p[20],bt[20],pri[20], wt[20],tat[20],i, k, n, temp;
	float wtavg, tatavg;
	system("cls");
	printf("Enter the number of processes --- ");
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		p[i] = i;
		printf("Enter the Burst Time & Priority of Process %d --- ",i);
		scanf("%d %d",&bt[i], &pri[i]);
	}
	for(i=0;i<n;i++)
		for(k=i+1;k<n;k++)
			if(pri[i] > pri[k])
			{
				temp=p[i];
				p[i]=p[k];
				p[k]=temp;
				temp=bt[i];
				bt[i]=bt[k];
				bt[k]=temp;
				temp=pri[i];
				pri[i]=pri[k];
				pri[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\tPRIORITY\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],pri[i],bt[i],wt[i],tat[i]);
	printf("\nAverage Waiting Time is --- %f",wtavg/n);
	printf("\nAverage Turnaround Time is --- %f",tatavg/n);
	getch();
}