#include<stdio.h>
#include<conio.h>
#include<dos.h>
#include<math.h>
#include<string.h>
#include<ctype.h>
#include<stdlib.h>
#include<rajesh.h>

main()
{
	float mean,variance,std_dev,sum,*a;
	int n,i;
	char resp[10];
	clrscr();
	printf("\nThis program will find the mean,variance and standard deviation of the given n \nnumbers\n\n");
	do
	{
		printf("\nHow many elements do you want to enter:");
		scanf("%d",&n);
		a = malloc(sizeof(float *) * n);    /*allocate memory*/
		printf("\nEnter the numbers:");
		for(i = 0;i < n;i++)
			scanf("%f",a+i);
		sum = 0;	/*reset accumulator sum*/
		for(i = 0;i < n;i++)
			sum += *(a+i);
		mean = sum/n;
		sum = 0;        /*reset accumulator sum*/
		for(i = 0;i < n;i++)
			sum +=  pow((*(a+i) - mean),2);
		variance = sum/n;
		std_dev = sqrt(variance);
		printf("\n\tMean               = %.3f\n\tVariance           = %.3f\n\tStandard Deviation = %.3f",mean,variance,std_dev);
		printf("\n\nDo for another set of values(y/n) ");
		scanf("%1s",resp);
	}
	while(*resp == 'y' || *resp == 'Y');
	printf("\n\n\nWaiting for you to hit a key");
	getch();
	print_rajesh();
	return;		/*keep the compiler happy*/
}