dev-cpp-users

[Dev-C++] Cubed Formula

[Scott <fre...@ve...>]

Okay another simple C question....

I would like to make a quick HP calculator in C.
(just mucking around with DevC)
I would like to ask for user input, and then show the total...

Something like:

#include <stdio.h>
main()
{
float Weight, Speed, Time;
printf("Enter the weight : ");
scanf("%f",&Weight);
printf("Enter the Speed : ");
scanf("%f",&Speed);
Time =3D Weight*Speed;
printf("\n Time is =A3%5.2f",total);
}

The formula is: hp =3D weight * (speed / 234)3

How does one used cubed? is it something like 234*x*x ?
Anyone shed some simple light...

The example above is just something i imagine it will look like...

Cheers,
Scott.

[Dev-C++] Cubed Formula

[Scott <fre...@ve...>]

Okay thanks to everyone, i'm looking into POW
and the maths.h.

This code example gives me Power as 1.38
And i wanted it to equal 330 HP....
Iv'e tried a few variations, but still no luck!


#include <stdio.h>
#include <math.h>
#define time 5.825
/*The formula is: hp =3D weight / (ET / 5.825)3*/
main()
{
float Weight, ET, Power;
printf("Enter the weight in pounds : ");
scanf("%f",&Weight);
printf("Enter the ET in Seconds : ");
scanf("%f",&ET);
Power =3D Weight/ET/pow(time,3);
printf("Power EST is %3.2f",Power);
}

I'm sure it's just a matter of the POW being
in the wrong place...?

Cheers,
Scott.

Re: [Dev-C++] Cubed Formula

[Scott <fre...@ve...>]

Should of mentioned

I used 3500 pounds (weight)
12.8 seconds (ET)

Should give me 330  (Power)
However power is giving me 1.38

Power =3D Weight/ET/pow(time,3);
The formula is: hp =3D weight / (ET / 5.825)3*

So what stupid thing am i doing wrong?

Cheers
Scott.


#include <stdio.h>
#include <math.h>
#define time 5.825
/*The formula is: hp =3D weight / (ET / 5.825)3*/
main()
{
float Weight, ET, Power;
printf("Enter the weight in pounds : ");
scanf("%f",&Weight);
printf("Enter the ET in Seconds : ");
scanf("%f",&ET);
Power =3D Weight/ET/pow(time,3);
printf("Power EST is %3.2f",Power);
}

Re: [Dev-C++] Cubed Formula

[Josh M. <mrl...@gm...>]

It looks to me like you want this:

Power =3D Weight / pow((ET / 5.825), 3);

Remember, the first parameter of pow() is the number you want raised
to a certain exponent.

On 10/30/05, Scott <fre...@ve...> wrote:
>
> Should of mentioned
>
> I used 3500 pounds (weight)
> 12.8 seconds (ET)
>
> Should give me 330  (Power)
> However power is giving me 1.38
>
> Power =3D Weight/ET/pow(time,3);
> The formula is: hp =3D weight / (ET / 5.825)3*
>
> So what stupid thing am i doing wrong?
>
> Cheers
> Scott.
>
>
>
> #include <stdio.h>
> #include <math.h>
> #define time 5.825
> /*The formula is: hp =3D weight / (ET / 5.825)3*/
> main()
> {
> float Weight, ET, Power;
> printf("Enter the weight in pounds : ");
> scanf("%f",&Weight);
> printf("Enter the ET in Seconds : ");
> scanf("%f",&ET);
> Power =3D Weight/ET/pow(time,3);
> printf("Power EST is %3.2f",Power);
> }
>
>
>
>


--
Cheers,
Josh

Re: [Dev-C++] Cubed Formula

[Scott <fre...@ve...>]

>It looks to me like you want this:

>Power = Weight / pow((ET / 5.825), 3);

Yes, thanks to all of you that did the trick.....
Now i'll just have to understand why that works...

I'm glad i'm not sending people to the Moon..:)

Thanks to everyone, for their prompt and helpful
replies, it really makes trying to learn this crap,
far more tolerable, with the excellent and quick help
from you guys..... I do appreciate it..

Thanks again....

Cheers,
Scott.

Re: [Dev-C++] Cubed Formula

[Josh M. <mrl...@gm...>]

pow( [base number], [exponent] )

pow( 2, 3 ) =3D=3D 8 =3D=3D 2^3 (where ^ represents exponent, not exclusive=
 or)
pow( 3, 2 ) =3D=3D 9 =3D=3D 3^2

Does that help?

On 10/30/05, Scott <fre...@ve...> wrote:
> >It looks to me like you want this:
>
> >Power =3D Weight / pow((ET / 5.825), 3);
>
> Yes, thanks to all of you that did the trick.....
> Now i'll just have to understand why that works...
>
> I'm glad i'm not sending people to the Moon..:)
>
> Thanks to everyone, for their prompt and helpful
> replies, it really makes trying to learn this crap,
> far more tolerable, with the excellent and quick help
> from you guys..... I do appreciate it..
>
> Thanks again....
>
> Cheers,
> Scott.
>
>
>
>
>
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--
Cheers,
Josh

Re: [Dev-C++] Cubed Formula

[Per W. <pw...@ia...>]

You either just write x*x*x or you #include <math.h>
and then write pow(x,3).

/Per W

On Mon, 31 Oct 2005, Scott wrote:

> Okay another simple C question....
>
> I would like to make a quick HP calculator in C.
> (just mucking around with DevC)
> I would like to ask for user input, and then show the total...
>
> Something like:
>
> #include <stdio.h>
> main()
> {
> float Weight, Speed, Time;
> printf("Enter the weight : ");
> scanf("%f",&Weight);
> printf("Enter the Speed : ");
> scanf("%f",&Speed);
> Time =3D Weight*Speed;
> printf("\n Time is =A3%5.2f",total);
> }
>
> The formula is: hp =3D weight * (speed / 234)3
>
> How does one used cubed? is it something like 234*x*x ?
> Anyone shed some simple light...
>
> The example above is just something i imagine it will look like...
>
> Cheers,
> Scott.
>