Re: [Dev-C++] float and double

[petermead <pet...@im...>]

Robert I like it...

&

Q: Any ideas on why this modulus returns an error when compiled?

/* basic code I am learning for colledge.
Hire cost is $0.30 per km and $200 per complete 1000km travelled */
// To Calculate hire car cost.
// By Peter Mead 06-03-2001.

#include <iostream.h>

void main()

{

     float ini_reading;
     float fin_reading;
     float km_travelled;
     float trav_cost;
     float wear_cost;

     // Title.
     cout << "Calculate the hire car cost. \n\n";

     // Ask for initial odometer reading.
     cout << "Please Enter the initial odometer reading :";
     cin >> ini_reading;

     // Ask for finial reading.
     cout << endl;
     cout << "Please Enter the finial odometer reading :";
     cin >> fin_reading;

     // Calculate costs.
     km_travelled = (fin_reading - ini_reading);
     trav_cost = (km_travelled * 0.3);
     wear_cost = ((km_travelled / 1000) - ((km_travelled % 1000) / 100) *
200);

     // Display total hire car cost.
     cout << "The total hire car cost is $" << (wear_cost + trav_cost);
     cout << endl << endl;

     // Finish program.
     cin.ignore(1);
     cin.get();


}

TIA...

----==<(*)>==----
Peter Mead :^)
pet...@im...
(GMT+10)_Victoria, Australia
~~~~~~~~~~~~~~~~~~~~~~
----- Original Message -----
From: <Rob...@ao...>
To: <dev...@li...>
Sent: Wednesday, March 07, 2001 12:22 AM
Subject: Re: [Dev-C++] float and double


In a message dated 06/03/01 13:09:20 GMT Standard Time,
pet...@im... writes:

<< Any quick explanations on the difference between a float and a double
when
 used as variables? >>

Take a look at float.h :-)

Or look below ;o)

<</*
 * The characteristics of float.
 */

/* The radix for floating point representation. */
#define FLT_RADIX   2

/* Decimal digits of precision. */
#define FLT_DIG     6

/* Smallest number such that 1+x != 1 */
#define FLT_EPSILON 1.19209290e-07F

/* The number of base FLT_RADIX digits in the mantissa. */
#define FLT_MANT_DIG    24

/* The maximum floating point number. */
#define FLT_MAX     3.40282347e+38F

/* Maximum n such that FLT_RADIX^n - 1 is representable. */
#define FLT_MAX_EXP 128

/* Maximum n such that 10^n is representable. */
#define FLT_MAX_10_EXP  38

/* Minimum normalized floating-point number. */
#define FLT_MIN     1.17549435e-38F

/* Minimum n such that FLT_RADIX^n is a normalized number. */
#define FLT_MIN_EXP (-125)

/* Minimum n such that 10^n is a normalized number. */
#define FLT_MIN_10_EXP  (-37)


/*
 * The characteristics of double.
 */
#define DBL_DIG     15
#define DBL_EPSILON 1.1102230246251568e-16
#define DBL_MANT_DIG    53
#define DBL_MAX     1.7976931348623157e+308
#define DBL_MAX_EXP 1024
#define DBL_MAX_10_EXP  308
#define DBL_MIN     2.2250738585072014e-308
#define DBL_MIN_EXP (-1021)
#define DBL_MIN_10_EXP  (-307)>>

XANDER: Who's a little fear demon? Come on, who's a little fear demon?
GILES: Don't taunt the fear demon.
XANDER: Why? Can he hurt me?
GILES: No, it's just tacky.
...
GACHNAR: I am the Dark Lord! Fear me!
WILLOW: He’s so cute!
BtVS Season 4 - "Fear, Itself"

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