Question

I need someone who is familiar with C++ to help me with this program that I'm trying to create..

Answer 1

I have two questions actually.. Well first one is probably simpler:
So i'm making a basic program (I'm new to programming) that converts meters to kilometers..

Answer 2

This is the code:

#include <math.h>
#include <conio.h>
#include <iostream>
#include "stdafx.h"
using namespace std;

int main()
{float Meters, Kilometers;
cout<<"Meters=";
cin>>Meters;
Kilometers=Meters/1000;
cout<<Meters<<" Meters is "<<Kilometers<<" Kilometers""\n";
system ("pause");
return 0;
}

Answer 3

But I was wondering if I could like make a shell for it instead of doing it in that ugly looking command prompt like screen..

Answer 4

you know right now it runs on that command prompt type black screen but I want it to be like an actual program, is there any way I can do that?

Answer 5

there probably is so the right question would be, how would I do that?

Answer 6

u want it to be an program that u open and u use some kind of GUI instead of using a terminal ?

Answer 7

yes

Answer 8

well am not am expert in this, if u are on linux u can use GTK or QT, but it will be a really boring thing to write an interface to make such a simple thing. On windows i have never done a program for it, so i dont know. Java have its on GUI its easy to use and works on windows, QT i think it works too, but i dont know.

Answer 9

Ohh I'm just at 0 level in programming and i just started playing around with it today since my programming class starts in four days, i guess that will have to wait..

Answer 10

Let me give you some advice. Forget about fancy UIs if you are actually trying to do some computations. A UI only matters if you are trying to release a product or tool for end users. You will just be wasting your time.

Answer 11

oh okay and alchemista why is that that some #include commands have:
<> and others have "":
like:
#include "stdafx.h"
#include <Windows.h>

Answer 12

the angle brackets signify that it should look for the include in the system/standard set of includes the quotes usually signify that the include is in the project itself.

Answer 13

Okay now here's another thing, if I don't need a GUI, how can I do this?
Right now I have a program that when u run it asks u for meters= then u put in a number it shows that in km and then it asks for km and if u put in a number it shows u meters. Now how can I make an option like even before it asks me for meters, i want it to have like 2 options:
M -> Km
Km -> M
and depending on which option i pick to convert from there..

Answer 14

You can setup a text based menu. It will first ask you for the menu item number, say 1 for M -> Km and 2 for Km to M.

Answer 15

Then ask for the data and do the appropriate conversion.

Answer 16

oh okay.. alchemista can u give me a code for like one option and i'll work from there for the 2nd option?

Answer 17

if u are starting i recommend an easier lenguage. First start with the basics, assigment, conditionals, loops, procedures, functions. Pascal its a good one for that. Then u can go for and object oriented, go with Java. After that u can go for a more complex things like C where u need to do the memory managment, or C++. If u want to go further u can learn other types of lenguages like functionals or logicals, like haskell or Prolog.

For ur question, ask how u want to convert and save it in a variable and then make and if statement one for Km->m and the other for the inverse.

Answer 18

He's taking a C++ course. It would be pretty silly to learn another language right before you start.

Answer 19

"For ur question, ask how u want to convert and save it in a variable and then make and if statement one for Km->m and the other for the inverse."

I am at 0 right now, how would I do that? And I don't want to get into some other language because yea as alchemista said ima start a C++ in 4 days and i will get lost tryin to learn both..

Answer 20

One second.

Answer 21

okay actually alchemista this thread is getting really long and it's getting slow i'll just post a new question..

Answer 22

ok

Answer 23

o lol, didnt know that, well u do something like this

int option;
cout << "Enter ur option:\n1) Km->m\n2)m->Km" << endl;
cin >> option;

if(option ==1){
//code for Km->m
}
else if(option == 2){
//code for m->Km
}
else
cout << "Wrong option" << endl;

Answer 24

#include <iostream>

using namespace std;

int main () {
char choice;
float value;
cout << "Select choice:" << endl
<< "1) Km -> M" << endl
<< "2) M -> Km" << endl;
for ( ;; ) {
cout << "Select: " << flush;
cin >> choice;
switch ( choice ) {
case '1':
break;
case '2':
cout << "Meters=" << flush;
cin >> value;
cout << value << " meters is " << value/1000.0 << " kilometers." << endl;
break;
default:
cout << "Unknown choice!" << endl;
}
}
return 0;
}

Answer 25

oh okay thanks a lot!

Answer 26

Look at my version, its much cleaner =P

Answer 27

yea i know now i have to study it..

Answer 28

thanks! let me mess around with it a bit..

Answer 29

hmm alchemista im getting an error..well not error something is wrong sort of..

Answer 30

You need to fill in option 1

Answer 31

only 2 works right now.

Answer 32

ohh okay thanks! i see cuz when I picked 1 it just asked me to select again haha..

Answer 33

I can finish it for you, but you asked me to only do one.

Answer 34

no ill do it..

Answer 35

well gl with it!

Answer 36

thanks and now alchemista here's another thing..

Answer 37

I did this:
int main () {
char choice;
float value;
cout << "Select choice:" << endl
<< "1) Km -> M" << endl
<< "2) M -> Km" << endl;
for ( ;; ) {
cout << "Select: " << flush;
cin >> choice;
switch ( choice ) {
case '1':
cout << "Kilometers=" << flush;
cin >> value;
cout << value << " kilometers is " << value*1000.0 << " meters." << endl;
case '2':
cout << "Meters=" << flush;
cin >> value;
cout << value << " meters is " << value/1000.0 << " kilometers." << endl;
break;
default:
cout << "Unknown choice!" << endl;
}
}
return 0;
}

Answer 38

you forgot to break

Answer 39

add break; at the end

Answer 40

and say I entered Select: 1 then it asked me for kilometers and converted that. After that it i asking me for Meters. how can i stop it from doing so? ohh that's the break i guess that's why..

Answer 41

also lets work in a new thread.

Answer 42

okay