Computer Science Canada

Stupid Nub Question

Author:

eNc [ Tue Jun 15, 2004 9:38 pm ]

Post subject:

Stupid Nub Question

Umm is it possible to write a statement in C++ similar to
a get statement in Turing where you can actually get a sentence or a word from the user ? eg..

code:

var a : string := ""
put "Enter your name"
get a

like cause i can't get more than 1 char from the "user"

--Thanks

Author:

Catalyst [ Tue Jun 15, 2004 9:41 pm ]

Post subject:

code:

string stuff;
cout<<"Enter stuff:"<<endl;
cin>>stuff;

or for multiple words

code:

char stuff[255];
cout<<"Enter stuff:"<<endl;
cin.getline(stuff,255);

Author:

wtd [ Tue Jun 15, 2004 10:00 pm ]

Post subject:

Re: Stupid Nub Question

eNc wrote:

Umm is it possible to write a statement in C++ similar to
a get statement in Turing where you can actually get a sentence or a word from the user ? eg..

code:

var a : string := ""
put "Enter your name"
get a

like cause i can't get more than 1 char from the "user"

--Thanks

Start out with the basic framework of a C++ program:

code:

int main()
{

}

Then you need the string library and the iostream library so you can deal with strings and input and output.

code:

#include <string>
#include <iostream>

int main()
{

}

Now, you'll want an equivalent for:

code:

var a : string := ""

code:

#include <string>
#include <iostream>

int main()
{
std::string a = "";
}

And then an equivalent for:

code:

put "Enter your name"

code:

#include <string>
#include <iostream>

int main()
{
std::string a = "";
std::cout << "Enter your name" << std::endl;
}

And an equivalent for:

code:

get a

code:

#include <string>
#include <iostream>

int main()
{
std::string a = "";
std::cout << "Enter your name" << std::endl;
std::cin >> a;
}

And just for fun, in Ruby Smile

code:

puts "Enter your name"
a = gets.strip

And Python...

code:

import sys

print "Enter your name"
a = sys.stdin.readline().strip()

Perl...

code:

print "Enter your name\n";
chomp(my $a = <STDIN>);

O'Caml

code:

let _ =
print_endline "Enter your name";
let a = read_line () in
print_endline a;;

Author:

wtd [ Tue Jun 15, 2004 10:04 pm ]

Post subject:

Catalyst wrote:

code:

string stuff;
cout<<"Enter stuff:"<<endl;
cin>>stuff;

or for multiple words

code:

char stuff[255];
cout<<"Enter stuff:"<<endl;
cin.getline(stuff,255);

Don't use char arrays when you should use std::string.

code:

#include <string>
#include <iostream>

int main()
{
std::string line = "";
std::getline(std::cin, line);
}

Author:	Catalyst [ Tue Jun 15, 2004 10:20 pm ]
Post subject:
havent used getline much (or at all), wasnt aware it took std::strings

Author:	eNc [ Tue Jun 15, 2004 11:10 pm ]
Post subject:
wtd holy you kno so many languages!

Author:

wtd [ Tue Jun 15, 2004 11:49 pm ]

Post subject:

Well, there are a few I didn't list there, and my knowledge of O'Caml is just starting to come together. Yet it's an incredibly nifty language. For instance:

code:

let plus1 = (+) 1;;
plus1 3;;
(* Same as... *)
1 + 3;;

Or a more practical example. The Printf module has a fprintf function similar to C's. But what if, for writing error messages out I don't want to always write:

code:

open Printf

Printf.fprintf stderr "%s\n" error_msg;;

I can instead write:

code:

open Printf

let print_err = Printf.fprintf stderr "%s\n";;

print_err "Oops...";;

Author:	eNc [ Wed Jun 16, 2004 6:39 am ]
Post subject:
wewt !!! What job do you work ? How long did it take you to learn those

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