Simple Algorithm

[Karl Heinz Buchegger]

Re: Simple Algorithm

savesdeday wrote:[color=blue]
>
>
> Last quick question, I am having trouble incorporating the equation to
> find the interest earned into C++. The equation is:
> Total interest earned = [(1+I/12)12 - 1]*B, and we are supposed to
> use cmath to do this. If I try to type in :
> tot_interest= (pow(1+rate/12, 12)-1)*balance
> and try to compile it, I get an error.[/color]

What error?

The compiler emits error messages to give you a hint on what is wrong
in your code. Read those error messages!
[color=blue]
> What is the correct format to
> implement the equation [(1+I/12)12 - 1]*B (using <cmath>) ?[/color]

What you have seems fine.
So what does the error message say?

--
Karl Heinz Buchegger
kbuchegg@gascad .at

[osmium]

Re: Simple Algorithm

Karl Heinz Buchegger wrote:
[color=blue]
> savesdeday wrote:[color=green]
> >
> >
> > Last quick question, I am having trouble incorporating the equation to
> > find the interest earned into C++. The equation is:
> > Total interest earned = [(1+I/12)12 - 1]*B, and we are supposed to
> > use cmath to do this. If I try to type in :
> > tot_interest= (pow(1+rate/12, 12)-1)*balance
> > and try to compile it, I get an error.[/color]
>
> What error?
>
> The compiler emits error messages to give you a hint on what is wrong
> in your code. Read those error messages!
>[color=green]
> > What is the correct format to
> > implement the equation [(1+I/12)12 - 1]*B (using <cmath>) ?[/color]
>
> What you have seems fine.[/color]

I think he needs some decimal points in his code, for starters.

[Karl Heinz Buchegger]

Re: Simple Algorithm

osmium wrote:[color=blue]
>
> Karl Heinz Buchegger wrote:
>[color=green]
> > savesdeday wrote:[color=darkred]
> > >
> > >
> > > Last quick question, I am having trouble incorporating the equation to
> > > find the interest earned into C++. The equation is:
> > > Total interest earned = [(1+I/12)12 - 1]*B, and we are supposed to
> > > use cmath to do this. If I try to type in :
> > > tot_interest= (pow(1+rate/12, 12)-1)*balance
> > > and try to compile it, I get an error.[/color]
> >
> > What error?
> >
> > The compiler emits error messages to give you a hint on what is wrong
> > in your code. Read those error messages!
> >[color=darkred]
> > > What is the correct format to
> > > implement the equation [(1+I/12)12 - 1]*B (using <cmath>) ?[/color]
> >
> > What you have seems fine.[/color]
>
> I think he needs some decimal points in his code, for starters.[/color]

The following compiles fine for me. It uses the exact
line the OP provides. It even comes up with a result which
seems to be plausible although I have not checked the exact
numbers.

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
double tot_interest;
double rate = 0.2;
double balance = 1.0;

tot_interest= (pow(1+rate/12, 12)-1)*balance;

return 0;
}

--
Karl Heinz Buchegger
kbuchegg@gascad .at