// nalkback.c -- nosy, informative program
#include <stdio.h>
// for strlen() prototype
#include <string.h>
// human density in pound per ft³
#define DENSITY 62.4

int main(void)
{
	float weight, volume;
	int size, letters;
	// name is an array of 40 chars
	char name[40];

	printf("Hi! What's your first name? ");
	scanf("%s", name);
	printf("%s, what's your weight in pounds? ", name);
	scanf("%f", &weight);
	size = sizeof name;
	letters = strlen(name);
	volume = weight / DENSITY;
	printf("Well, %s, your volume is %2.2f cubic feet.\n",
		name, volume);
	printf("Also, your first name has %d letters,\n", letters);
	printf("and we have %d bytes to store it in.\n", size);
	return  0;
}