Removing chars

How can I remove parts of an array?

Code:

---

char message[60];
cin.get (message, 60);

---

I want to remove everything except letters from the array.

For example: THIS SITE & THAT SITE RULE!! would become THISSITETHATSITERULE

Optimally, the deleted text would allow the rest of the array to bump down (if message[0] was whitespace it would remove it and replace things to make message[0] the next letter character).

I did a google search but couldn't seem to find anything to do the trick for me.

Thanks in advance :)

you can create a for loop that searches each array index for a " " whitespace character. If it is a " " whitespace then just insert "" nothing into that array slot.

A loop, and some of the nice functions from <cstring> ought to do the trick. :)
http://www.cppreference.com/stdstring.html

And... You can't really insert a 'nothing' into the array slot. What you could do, is look for the next valid character, and move it down into that slot. You will end up with some empty space at the end of your string, so you could just recopy the string into another, appropriately size string. (Also, consider using std::string; it'd make your life a bit easier.)

After a few initial troubles (and a Simpson's episode later), I came up with this:

Code:

---

int y=0;
char input[60];
cin.getline (input, 60, '\n'); 

char message[strlen(input)];

for(int i=0; i<(strlen(input)); i++) {
    input[i] = toupper(input[i]);
   
    if ( isalpha(input[i]) ) {
        message[y] = input[i];
        y++;   
    }   
}

---

Edit: I had a problem due to the array ending up shorter, so I put in code to put in a null value. Solved my own problem :p

You aren't allowing room for the null character in your message buffer.

Quzah.

Quote:

---

Originally Posted by quzah

You aren't allowing room for the null character in your message buffer.

Quzah.

---

Just found that before hitting refresh. Thanks though! :D

write it to a file then read it back in ingoring all the invalid characters would be the easiest IMO. That gets rid of the spaces.
use strcat to add the different words together in the case of !@#$%^&*()[][]-=+_><.,\|/?~` just make a switch statement that ignores them and saves the good stuff.

That would require creating a file, though, and would be a waste of space.