/* Laboratory Assignment 4
   Problem 1   
   Name:      
   Roll No:                  */

/* REPLACE ALL UNDERSCORES ( _ ) WITH APPROPRIATE WORDS */ 

#include <stdio.h>
#include <math.h>

/* Finds average and variance etc of n students' marks */

main()
{
	_____ Average;    /* Fill in the blanks */
	_____ Variance;
	int	  Marks[100];
	int	  Roll;
	int   Lowest = 100;  /* Why???? */
	int   Highest = 0;
	int	  n;
	int	  SquaredSum;
	int	  Sum;

	printf("Input the number of students --> ");
	scanf("%d",&n);
	/* Here the roll nos begin with 0 */
	Roll = 0;
	while ( _________ )
		scanf("%d",&Marks[______]);

	Roll = 0;
	Sum = 0;
	SquaredSum = 0;
	while ( Roll < n )
	{
		Sum = Sum + ____;
		SquaredSum = SquaredSum + _____;
		if ( Marks[Roll] > Highest ) Highest = Marks[Roll];
		if ( Marks[Roll] < Lowest ) Lowest = Marks[Roll];
		Roll++;   /* Shortcut for Roll = Roll + 1 */
	}
	Average = (float)Sum/n;
	Variance = (float)SquaredSum/n - Average*Average;
	printf("Average = %f\nVariance  = %f Highest = %d Lowest = %d\n",Average,Variance, Highest, Lowest);
	
	/* WRITE CODE FOR PRINTING THE TABLE. */
}