C++ code into Ruby, I need it fast, no time for RTFM

steelheart · April 25, 2007, 11:29am

#include <iostream.h>
#include <conio.h>

void r_string(int n, int v[])
{
int i;

for(i=0;i<n;i++)
 {
 cout<<"v["<<i<<"]=";
 cin>>v[i];
 }

}

void p_string(int n, int v[])
{
int i;
cout<<"\nThe string is : ";

for(i=0;i<n;i++)
    cout<<v[i]<<"  ";

}

float avarage_string(int n, int v[])
{
int i,s=0;
float av;
for(i=0;i<n;i++)
s+=v[i];

av=(float)s/n;

return av;
}

void main()
{
clrscr();

int no, a[20];
cout<<" no = ";
cin>>no;
r_string(no,a);
p_string(no,a);

cout<<"String avarage is : "<<avarage_string(no,a);

getch();
}

Strings value are read from the keyboard, and i need a getch and clrscr
method.
And how can I export the ruby code into *.exe ?

Can somebody translate this into ruby ? I need it fast…

steelheart · April 25, 2007, 11:35am

On 4/25/07, Andrei U. [email protected] wrote:

Strings value are read from the keyboard, and i need a getch and clrscr
method.
And how can I export the ruby code into *.exe ?

Can somebody translate this into ruby ? I need it fast…

DYOH - Do Your Own Homework

steelheart · April 25, 2007, 11:48am

Richard C. wrote:

On 4/25/07, Andrei U. [email protected] wrote:

Strings value are read from the keyboard, and i need a getch and clrscr
method.
And how can I export the ruby code into *.exe ?

Can somebody translate this into ruby ? I need it fast…

DYOH - Do Your Own Homework

It’s not homework. I need the code for personal use today. I want to
learn ruby and if i have that code in ruby i can understand some things.
I wan to use ruby code 4 some algorithms and if i have that code
translated i can do it myself the rest of them.

steelheart · April 25, 2007, 12:55pm

On Apr 25, 2007, at 6:29 PM, Andrei U. wrote:

cout<<“v[”<<i<<“]=”;
for(i=0;i<n;i++)

cout<<" no = ";
Strings value are read from the keyboard, and i need a getch and
clrscr
method.
And how can I export the ruby code into *.exe ?

Can somebody translate this into ruby ? I need it fast…

–
Posted via http://www.ruby-forum.com/.

Translate this for me, right now. No, by yesterday. == A time when
you pay someone to do it. Or ask much nicer. But if you are trying to
say that you’re going to learn Ruby by comparing that C++ code to
some Ruby code that accomplishes the same thing, you are either
fooling us OR fooling yourself. Ruby and C++ are different enough
that a side-by-side comparison isn’t going to teach you much of
anything in this case. It would more likely just confuse you, friend.

steelheart · April 25, 2007, 1:44pm

Translate this for me, right now. No, by yesterday. == A time when
you pay someone to do it. Or ask much nicer. But if you are trying to
say that you’re going to learn Ruby by comparing that C++ code to
some Ruby code that accomplishes the same thing, you are either
fooling us OR fooling yourself. Ruby and C++ are different enough
that a side-by-side comparison isn’t going to teach you much of
anything in this case. It would more likely just confuse you, friend.

I need that 'cause i want to use ruby for some algorithms, i don’t want
to write them in C i want them in ruby. So if i had that example i can
do the rest myself.

steelheart · April 25, 2007, 2:13pm

There are still ways to ask for things.

steelheart · April 25, 2007, 11:55am

On Wed, Apr 25, 2007 at 06:29:35PM +0900, Andrei U. wrote:

Can somebody translate this into ruby ? I need it fast…

Please read:
http://www.catb.org/~esr/faqs/smart-questions.html#urgent

Then read the whole of the rest of that document.

steelheart · April 25, 2007, 2:30pm

On Wed, 25 Apr 2007 20:44:52 +0900, Andrei U. wrote:

I need that 'cause i want to use ruby for some algorithms, i don’t want
to write them in C i want them in ruby. So if i had that example i can
do the rest myself.

Still, being polite does not hurt.
And not everyone does read C++ fluently.

As far as I can see, the code is
concerned with printing some stuff.
But I have evaded C++ for long
enough to not be sure about its intention.

What is it that you’re trying to do?

We can show you how to do this in Ruby,
which might be surprisingly different from
a line-by-line translation of the code you posted.

s

steelheart · April 25, 2007, 3:16pm

We can show you how to do this in Ruby,
which might be surprisingly different from
a line-by-line translation of the code you posted.

But line by line is more fun:

void p_string(int n, int v[])

Throw out return type, argument type and give the method a rubyesque
name:

def chunky_chunky_bacon(chunky, bacon)

{
lose the burly bracket.

int i;
get rid of the local declaration.

cout<<"\nThe string is : ";

cout is called STDOUT, you don’t need semicolons, and the string
you’re printing isn’t ruby enough;

STDOUT << “\nWelcome to the madhouse :”

for(i=0;i<n;i++)

for loop is different

for ding_dong in 0…chunky-1

cout<<v[i]<<" ";
turns into
STDOUT << bacon[dingdong] << " " # this should look familiar by now
end

end the closely curly brace
}
becomes:
end

Putting it all together:

void p_string(int n, int v[])
{
int i;
cout<<"\nThe string is : “;
for(i=0;i<n;i++)
cout<<v[i]<<” ";
}

becomes:

def chunky_chunky_bacon(chunky, bacon)
STDOUT << “\nWelcome to the madhouse :”
for ding_dong in 0…chunky-1
STDOUT << bacon[ding_dong] << " "
end
end

steelheart · April 25, 2007, 3:31pm

On Apr 25, 2007, at 10:16 PM, Tim B. wrote:

cout is called STDOUT, you don’t need semicolons, and the string

Putting it all together:

s

c’est bon!

steelheart · April 25, 2007, 3:32pm

Andrei U. wrote:

cout<<“v[”<<i<<“]=”;
for(i=0;i<n;i++)

cout<<" no = ";
Strings value are read from the keyboard, and i need a getch and clrscr
method.
And how can I export the ruby code into *.exe ?

Can somebody translate this into ruby ? I need it fast…

Well, since you ask that nicely…
This may get you started

print "number of entries: "
no = gets.to_i

a = []
no.times do |i|
print "enter item nr. #{i}: "
a << gets.to_i
end

p a

puts a.inject(0){|s, x| s + x}.to_f / a.size unless a.empty?

It’s rather quick-and-dirty, but then, so was your C++ code.

HTH,

Michael

–
Michael U.
R&D Team
ISIS Information Systems Austria
tel: +43 2236 27551-542, fax: +43 2236 21081
e-mail: [email protected]
Visit our Website: www.isis-papyrus.com

steelheart · April 25, 2007, 4:55pm

On 4/25/07, Andrei U. [email protected] wrote:

Strings value are read from the keyboard, and i need a getch and clrscr
method.
And how can I export the ruby code into *.exe ?

Can somebody translate this into ruby ? I need it fast…

Have you gotten a suitable answer yet?

There are several options for you here.

Transliterate into Ruby (as you imply)
Leave your code as-is and wrapper it using Ruby’s C api
Leave your code as-is and use the Ruby DL module to load your
library and invoke the methods
Use the RubyInline module to simply “inline” your C/C++ code into a
Ruby program

By far the quickest solution is going to be the RubyInline route.
You’ll need a compiler installed on your machine to handle the C++
code compilation step RubyInline performs. You can install RubyInline
via the gem command:

gem install -r rubyinline

Shoot a nice note of thanks off to Eric H. and Ryan D… They’ve
done a great job with that little gem.

Have fun learning Ruby! I’ve learned far more about programming by
using Ruby than I ever learned using C/C++ or Java.

Blessings,
TwP

steelheart · April 25, 2007, 5:15pm

doh, sorry to all of you cos i’m not so polite as you want… c’est
la vie;
some person aren’t so polite but that don’t means that they don’t
respect your work or help.

Thanks to all off you who tried to help me

This is what i was trying to do :

def r_string( n, v )
        n.times do |i|
                print "v[#{i}] = "
                v << readline.to_i
        end
end

def p_string( v )
        print "\nThe string is: " + v.join("  ")
end

def average_string( v )
        v.inject {|sum, x| sum + x} / v.size.to_f
end

print "no = "
no = readline.to_i
a = []
r_string( no, a )
p_string( a )

puts "\nString average is #{average_string(a)}"

readline

Thanks again to those who helped me !!
Have a nice day !
(sorry for any speeling mistakes, english isn’t my first language )

steelheart · April 25, 2007, 6:36pm

Andrei U. wrote, On 4/25/2007 4:29 AM:

Can somebody translate this into ruby ? I need it fast…

I don’t mean to be rude, but I’m with most of the others on this. I
found it amusing (is that mean of me?) that you have no time to RTFM,
but you have time to wait longer than it would have taken to RTFM for
someone to answer. You don’t need an entire book for loops and printing
strings. Thats page one stuff in any language, I would think.

steelheart · April 25, 2007, 5:45pm

On Thu, 26 Apr 2007 00:16:01 +0900, Andrei U. wrote:

This is what i was trying to do :

This is something I can read
You want to calculate the arithmetic mean of some numbers.

I’d do the following as a basic attempt without any
bells and whistles:

1 lines = $stdin.readlines
2 numbers = lines.collect { |line| line.to_f }
3 total = numbers.inject(0) { |sum, x| sum + x }
4 mean = total / numbers.size
5 puts(“Arithmetic mean: #{mean}”)

You could insert some filter for non-parseable input
between 1 and 2, skip over the unnecessary calculations
in case there was no input with a conditional between 2 and 3,
show the entered values like you did between 4 and 5.

There’s no need to “preallocate” arrays, as you can return
any object in ruby. You can even return multiple objects and
access them immediately or through the wrapping array.

HTH,
s.

steelheart · April 25, 2007, 7:49pm

Sammy L. wrote:

Andrei U. wrote, On 4/25/2007 4:29 AM:

Can somebody translate this into ruby ? I need it fast…

I don’t mean to be rude, but I’m with most of the others on this. I
found it amusing (is that mean of me?) that you have no time to RTFM,
but you have time to wait longer than it would have taken to RTFM for
someone to answer. You don’t need an entire book for loops and printing
strings. Thats page one stuff in any language, I would think.

No, i did rftm and i’m doing it even now :))
It’s ok… I’m fine, don’t need to worry 4 me, btw if u have some good
ruby doc pleas links gimme to me i’m ruby doc hungry.

steelheart · April 25, 2007, 8:40pm

On Thu, Apr 26, 2007 at 02:49:45AM +0900, Andrei U. wrote:

if u have some good
ruby doc pleas links gimme to me i’m ruby doc hungry.

http://www.rubycentral.com/book/ (or better: buy the 2nd edition)

http://www.ruby-lang.org/en/documentation/quickstart/

steelheart · April 25, 2007, 8:00pm

Andrei U. [email protected] writes:

It’s ok… I’m fine, don’t need to worry 4 me, btw if u have some good
ruby doc pleas links gimme to me i’m ruby doc hungry.

Here’s a link for you: http://www.dictionary.com

sherm–

steelheart · April 25, 2007, 10:56pm

Guys, let’s back off, please. I think the OP has gotten the message
loud and clear.

steelheart · April 26, 2007, 8:45am

Andrei U. wrote:

strings. Thats page one stuff in any language, I would think.

No, i did rftm and i’m doing it even now :))
It’s ok… I’m fine, don’t need to worry 4 me, btw if u have some good
ruby doc pleas links gimme to me i’m ruby doc hungry.

Welcome to Ruby, Andrei.

A Ruby book like no other can be found at

http://poignantguide.net/ruby/

HTH,

Michael

–
Michael U.
R&D Team
ISIS Information Systems Austria
tel: +43 2236 27551-542, fax: +43 2236 21081
e-mail: [email protected]
Visit our Website: www.isis-papyrus.com