Vectors and Arrays

Character Arrays

Many string functions in the standard library depend on zero terminators in character arrays.

int strlen(const char s[])
{
   int i = 0;
   while (s[i] != '\0')
      i++;
   return i;
}

It's important to not forget the space for the zero terminator.
It's helpful to declare character arrays with an "extra space" for the zero terminator.
```
const int MYSTRING_MAXLENGTH = 4;
char mystring[MYSTRING_MAXLENGTH + 1];
```