Here's an example that uses the c-style string utility functions that
come with #include <cstring>

char me[] = "Faan Tone";
char him[] = "Teddy";
char another[20];
cout << me;           // outputs "Faan Tone"
strcpy(another, me);  // copies "Faan Tone" into the variable another
cout << strlen(me);   // outputs 9
if (strcmp(him, me) < 0)
    cout << him << " " << me;   // outputs the two names in alphabetical order
else cout << me << " " << him;
// Now try to swap him and me:
strcpy(another, me);   // copy "Faan Tone" into the variable another
strcpy(me, him);       // copy "Teddy" into the variable me
strcpy(him, another);  // Big bug here!  There's not enough space in the
                       // variable him to hold the contents of another.
                       // To fix this problem, we need to learn all about
                       // dynamically allocated memory.  OR, we could use
                       // the string class, which handles this problem for us


Same code, done with strings:
string me("Faan Tone");
string him("Teddy");
string another;
cout << me;
another = me;  // entire string in me is copied to variable another
cout << me.length();
if (him < me)
    cout << him << " " << me;
else cout << me << " " << him;
// Now here's the swap
another = me;
me = him;
him = another;  // no bugs here! this works perfectly, thanks to the string
                // class which handles all memory issues for us.