Time and distance calculator

*  Program to input 10 sets of data (time and distance) then output
a table of time, distance and speed complete with totals and averages.
 
No validation 
*/
#include <stdio.h>
#include <stdlib.h>
#define MAX 3
void main(void)
{
	float time[MAX],distance[MAX],speed[MAX];
	float totaltime=0,totaldistance=0;
	float averagetime,averagedistance,averagespeed;
	char buff[20];
	int i;
 
 
	/* Input */
	for(i=0;i<=MAX-1;i++)
	{
		printf("Data set %d\n",i+1);
		printf("\tEnter the time:");
		time[i]=atof(gets(buff));
		printf("\tEnter the distance:");
		distance[i]=atof(gets(buff));
	}
 
 
	/* Calculation */
	for(i=0;i<=MAX-1;i++)
	{
		totaltime = totaltime +time[i];
		totaldistance = totaldistance + distance[i];
		speed[i] = distance[i] / time[i];
	}
	averagetime = totaltime / MAX;
	averagedistance = totaldistance / MAX;
	averagespeed = totaldistance / totaltime; /* This is the true average speed */
 
	/* Output*/
	printf("\n\n Table of Results \n");
	printf("\t\tDistance(m)\t   Time(s)\t    Speed(m/s)\n\n");
	for(i=0;i<=MAX-1;i++)
	{
		printf("\t\t%8.1f\t%8.1f\t%8.2f\n",distance[i],time[i],speed[i]);
	}
	printf("Total\t\t%8.1f\t%8.1f\n",totaldistance,totaltime);
	printf("Average\t\t%8.1f\t%8.1f\t%8.2f\n",averagedistance,averagetime,averagespeed);
}