Thread: i position of a string

I'm trying to work with some code like this:

Code:

#include <string>
#include <vector>
#include <iostream>

using namespace std;
  int main(void){
  string letters="AAAAAA";
  int len=letters.size();
  for(int i=0; i<len; i++)cout<<" letters[i]="<<letters[i];
  return(0);
}

I'm expecting it to return results like
letters[i]=A letters[i]=A letters[i]=A..... etc.
but it returns
letters[i]=AA letters[i]=AA letters[i]=AA

Point is, I'm expecting it to return one(1) character,
but it returns two(2). How do I get it to return only the
character in the string at position i?

This code is correct,and works as expected ( letters[i]=A letters[i]=A letters[i]=A..... etc.).


@hk_mp5kpdw
at is [],but with index checking.

This code is correct,and works as expected ( letters[i]=A letters[i]=A letters[i]=A..... etc.).

I am using Borland C++ and it returns letters[i]=AA !?
What gives?

code:--------------------------------------------------------------------------------for(int i=0; i<len; i++)cout<<" letters[i]="<<letters.at(i);

what is the .at() ? ie-which library is needed and what does it do? Basically, I just need more info on it?

That code works fine on my compiler(gcc 3.2). at( ) is a member function of the string object...you don't need a special library for it. What version of Borland are you using?

It is not letters[i].at(); but rather letters.at(i);

Well, that compiles and runs, but it still retuns two(2) characters instead of one!?

Maybe it really is just 1 character...but for some reason it's not printing correctly or is printing out of order? That output you have there isn't formatted very well anyway. This probably isn't the case...just a suggestion

and an endl at the end, just for format's sake

.

This is what I'm getting for output: [15 A's] + "Original Message:" + [5 A's]

I'm getting the duplication here:

Code:

cout<<"typed[j]="<<typed[j];

note: I added <<"typed[j]="
I seem to have posted an older copy of the code instead of the latest

OK, I finally see it. I was printing typed or letters twice without realizing it. Changed string main to int main, but this was never the problem. Approach was correct but I had logic errors, which I've corrected and code appears to now work correctly.
Thanks.