extracting letters from string

imaguni · 10-21-2007, 07:19 PM

Can someone tell me how to extract each letters out of a string in order?

like cin>>Sentence1;

inputs:hi whats up

how would you extract each letter and be able to reuse them invididualy? I would like to make a translator from binary to english/english to binary. Would this require an array?

TwitcH · 10-21-2007, 09:53 PM

hrm, I can show you a quick example in C, but I dont have time to explain it yet

Code:

#include <stdio.h>
#include <unistd.h>
int main (void) {
        char *ptr = "Hello, World";
        for (int i = 0; *(ptr + i); i++) {
                putchar(*(ptr+i));
                fflush(stdout);
                usleep(500000);
}
putchar('\n');
}

If I get time I'll explain each part to you.

Hope it helps =/

imaguni · 10-22-2007, 02:21 AM

The only thing i understood about that is that you're doing a for loop ^.^

If you have the time please explain what each thing is doing.

Eriond · 10-22-2007, 04:05 AM

Well, okay, I'll explain what TLM did, and I'll simplify it. (And won't that run into a segmentation fault, because you're running off the end of array there?)

Code:

int main()
{
      char Line[] = "Hello World!\0"
      for (int C = 0; C < strlen(Line); C++)
            cout << "Character " << C << ": " << Line[C] << endl;
      return 0;
}

Basically, what you're doing here is looping through a character array, until C is greater than or equal to strlen(Line) (which is a function that tells you how long a string is, if it's terminated by a null terminator character, the \0 there.), and then printing every character in the string to the terminal. Each individual character can be accessed by specifying exactly where in the array it is. So for example.

The character 'H' is Line[0]. The Character 'W' is Line[6].

Alterinatively, if you want to do it with cin, and get the user's input, you can write the first line of the program (the Line[], line), like this:

Code:

char Line[100];
cin >> Line;

And keep the rest of the program as-is.

Hope that answers your question!

TwitcH · 10-23-2007, 12:48 PM

Yeah I just read the OP again and that really wasnt a good example I gave

Sorry about that, it was sort of the same thing, mine would print each letter of the string individually with a small pause between each character, plus it was quick dirty C with pointers and *nix commands

So yeah, ignore my example if you wish to stay sane.

I gotta stop posting in here, i'm gonna confuse all the C++ kiddys.

imaguni · 10-23-2007, 11:18 PM

lol its ok, thank you both of you.

10-21-2007, 07:19 PM	#1 (permalink)
imaguni Banned Join Date: Oct 2007 Posts: 54 MMOFaces Profile: None Yet	extracting letters from string Can someone tell me how to extract each letters out of a string in order? like cin>>Sentence1; inputs:hi whats up how would you extract each letter and be able to reuse them invididualy? I would like to make a translator from binary to english/english to binary. Would this require an array?

10-21-2007, 09:53 PM	#2 (permalink)
TwitcH Retired Staff Join Date: May 2006 Posts: 2,026 MMOFaces Profile: None Yet	hrm, I can show you a quick example in C, but I dont have time to explain it yet Code: #include <stdio.h> #include <unistd.h> int main (void) { char ptr = "Hello, World"; for (int i = 0; (ptr + i); i++) { putchar(*(ptr+i)); fflush(stdout); usleep(500000); } putchar('\n'); } If I get time I'll explain each part to you. Hope it helps =/

10-22-2007, 04:05 AM	#4 (permalink)
Eriond Snakes Big Toe Join Date: May 2006 Location: Canada Posts: 445 Reputation: 17 MMOFaces Profile: None Yet	Well, okay, I'll explain what TLM did, and I'll simplify it. (And won't that run into a segmentation fault, because you're running off the end of array there?) Code: int main() { char Line[] = "Hello World!\0" for (int C = 0; C < strlen(Line); C++) cout << "Character " << C << ": " << Line[C] << endl; return 0; } Basically, what you're doing here is looping through a character array, until C is greater than or equal to strlen(Line) (which is a function that tells you how long a string is, if it's terminated by a null terminator character, the \0 there.), and then printing every character in the string to the terminal. Each individual character can be accessed by specifying exactly where in the array it is. So for example. The character 'H' is Line[0]. The Character 'W' is Line[6]. Alterinatively, if you want to do it with cin, and get the user's input, you can write the first line of the program (the Line[], line), like this: Code: char Line[100]; cin >> Line; And keep the rest of the program as-is. Hope that answers your question! __________________ This was a triumph. I'm making a note here, HUGE SUCCESS. Outsider 3D Space Shooter/RPG in Development http://advena.awardspace.com/

10-23-2007, 12:48 PM	#5 (permalink)
TwitcH Retired Staff Join Date: May 2006 Posts: 2,026 MMOFaces Profile: None Yet	Yeah I just read the OP again and that really wasnt a good example I gave Sorry about that, it was sort of the same thing, mine would print each letter of the string individually with a small pause between each character, plus it was quick dirty C with pointers and nix commands So yeah, ignore my example if you wish to stay sane. I gotta stop posting in here, i'm gonna confuse all the C++ kiddys. Last edited by TwitcH; 10-23-2007 at 12:52 PM.*

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10-22-2007, 02:21 AM	#3 (permalink)
imaguni Banned Join Date: Oct 2007 Posts: 54 MMOFaces Profile: None Yet	The only thing i understood about that is that you're doing a for loop ^.^ If you have the time please explain what each thing is doing.

10-23-2007, 11:18 PM	#6 (permalink)
imaguni Banned Join Date: Oct 2007 Posts: 54 MMOFaces Profile: None Yet	lol its ok, thank you both of you.

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