How do we copy a section of a char array that doesn't start at the beginning?

Projects Programming
12

MichaelMeissner:

StuHooper:
If I want to split a 140 char array into chars of 21 length for display on an LCD screen, what command/s do I need to do so?

This program logically does:

static const int lcd_width = 20;

void print_large_array (const char *array, size_t len)
{
   size_t i;
   char small_array[21];

if (len == 0)
       len = strlen (array);                // figure out length if not passed

while (len > 0) {
       size_t len2 = (len > lcd_width) ? lcd_width : len;
       for (i = 0; i < len2; i++)
           small_array[i] = array[i];

small_array[len2] = '\0';
       lcd.println (small_array);
       array += len2;                        // reset pointer/len for next iteration
       len -= len2;
   }
}

Thanks. I found this works, although due to having to draw a graphic.box to the screen before each line of code, I can't have it scrolling very fast. This seems to be interfering with my Ethernet connection as it's holding up my loop();