C++ Help

[JurseyRider734]

I need someone who's good at C++ to maybe make me this code. It's probably really basic for someone who's knowledgable about it but I got really confused. I can just check this thread and copy and paste it into there tomorrow.

Programming Project: ProfitMargin

To make a profit, a local store marks up the prices of its items by a certain percentage. Write a C++ program that reads the original price of the item sold, the percentage of the marked-up price, and the sales tax rate. The program then outputs the original price of the item, the percentage of the mark-up, the store's selling price of the item, the sales tax rate, the sales tax, and the final price of the item. (The final price of the item is the selling price plus the sales tax.


Thanks >_>

[lightdarkness]

RE: C++ Help

That isn't C++, that's math

If you're familiar with how to cin and cout stuff, it's really all about knowing what kind of math is involved.

I can't remember how variables are stored in C++, but my first suggestion for you is to take out a sheet of paper, and do one practice input.

[QreepyBORIS]

RE: C++ Help

You can use Doubles/Floats and <iomanip.h>'s set preceision function, if you've learned it. The math involved is really easy, unless you have a weird taxation percent in New Jersey.

[JurseyRider734]

RE: C++ Help

what.

[soccr743]

Re: C++ Help

To make a profit, a local store marks up the prices of its items by a certain percentage. Write a C++ program that reads the original price of the item sold, the percentage of the marked-up price, and the sales tax rate. The program then outputs the original price of the item, the percentage of the mark-up, the store's selling price of the item, the sales tax rate, the sales tax, and the final price of the item. (The final price of the item is the selling price plus the sales tax.

First off, are you reading this from a file? Or from the command prompt...

Secondly, you need to just know math. Just use the variable type "float" for the variable in this case.

Thirdly, you need to know how to convert from a string or char* to a floating point number. I use my own String class library, so I am not sure if the standard library contains a method for converting strings to integers or floats.

-----Soccr743-----

[QreepyBORIS]

RE: Re: C++ Help

Why/how on Earth would you go from char/string to a float?

[JurseyRider734]

RE: Re: C++ Help

Keep in mind i've been in C++ for a week, and I have no fucking clue what you're talking about. It doesn't matter what the numbers are, i'm just confused with what to put.

The only reason i'm posting is because i'm a day behind in my class. So while everyone is on addictinggames, i'm sitting there confused with this goddamn thing.

[soccr743]

RE: Re: C++ Help

Qreepy, you read from the console into the buffer which is in char* format... Then, you would need to convert that to a float in order to use it in calculations.

I would talk with you on AIM about it Eva, but I have a boatload of homework and you bloxed meh

-----Soccr743-----

[chickendude]

RE: C++ Help

I can do C, but I'm guessing its mostly the same except for minor syntactical stuff <_<

main()
{
 float oprice, taxrate, markup,fprice,sprice,tax;

 printf("print the original price, tax rate percentage, and markup percentage")
 scanf("%f %f %f",&oprice,&taxrate,&markup);

 sprice = oprice * (1 + (markup/100) );
 taxprice = sprice * (1 + taxrate/100);
 fprice = sprice + taxprice;

 printf("original price is %f \n markup is %f \n taxrate is %f \n",oprice,markup,taxrate")
 printf("store price is %f \n sales tax is %f \n final price is %f\n",sprice,tax,fprice");
}

now just change the printfs into couts and scanf into a cin and you win
I don't know the syntax for couts and cin >_<
would someone like to tell me
Is it just the same but with << >> instead of () ?

EDIT:
PS, in C to go from string to int its
stoi(insertstringhere)
and you have to #include <stdlib.h>
and stof for string to float
ftoi, itof, they're all there <_< itos ftos <_<

[JurseyRider734]

RE: C++ Help

That's COMPLETELY different.

Soccr, I unblocked you a while ago rofl wtg

[chickendude]

RE: C++ Help

after getting some rudimentary C++ syntax help <_<

#include <iostream>
main&#40;&#41;
&#123;
 float oprice, taxrate, markup,fprice,sprice,tax;

 cout<<"print the original price, tax rate percentage, and markup percentage";
 cin>>oprice>>taxrate>>markup;

 sprice = oprice * &#40;1 + &#40;markup/100&#41; &#41;;
 taxprice = sprice * &#40;1 + taxrate/100&#41;;
 fprice = sprice + taxprice;

 cout<<"original price is",oprice;
 cout<<"markup is",markup;
 cout<<"taxrate is",taxrate;
 cout<<"store price is",sprice;
 cout<<"sales tax is",tax;
 cout<<"final price is",fprice;
&#125;

I don't know whether you need to do int main or void main
and also I don't know what lib to include
is it #include <iostream> ?

this should be slightly less way different, I hope <_<

EDIT: Edited in iostream

[talisman]

RE: C++ Help

yeah it's <iostream>

chicken's program should work.

[soccr743]

RE: C++ Help

I question this line:

"cin>>oprice,taxrate,markup;"

Seems as though it should be this:

"cin >> oprice >> taxrate >> markup;"

But again, I don't do much work with the console.

-----Soccr743-----

[chickendude]

RE: C++ Help

Well I don't either, if you're right, then I'll edit it in, so does anyone else know?

EDIT:
I just realized that was soccr speaking so uh <_< I'll go ahead and change that

[soccr743]

RE: C++ Help

Hell, me speaking does not mean I am right... Especially when it comes to console programming. I really only did this stuff like a year ago when I first started and have since then moved from SDL to DirectX.

-----Soccr743-----