code reading explanation?

[campos10]

Hi everyone, im jabing trouble understanding how this piece of code does what it does.

Prior to this, the string spelling is inputted by the user. In the example, the user enters "-" symbols in between letter characters. The program then outputs "you spelled 'word'" without any of the symbols in between. Can someone explain to me what i am not understanding? I feel it has something to do with the role of the [] brackets. Thanks for the help!

  string  word; 
int  i  =  0;  
while(i  <  spelling.length())  
{ word  +=  spelling[i];         
 i  +=  2;      } 

[long double main]

spelling[i] gives you the (i+1)th character of spelling (remember, indices start at 0).

So what the code does is visit every other character of spelling and appends it onto word.
(The i += 2; line increments the position by 2.)

This could also be done by using std::remove in the <algorithm> header to remove the '-' characters (unless the word itself has dashes in it, in which case those will be removed as well).