"row" was not declared in this scope

mouseketier · April 3, 2020, 11:46pm

Hello, I am very new to this but with current situation in the world i wanted to create a project that would show some spirit to display in my window. I have used a sketch that was posted as untested and modified it to the arrays I wanted. I have run into an issue with the below code stating "row" and "col" not declared in this scope. Any help would be appreciated. I added link to git as code is too long to post here.

github.com

mouseketier/merica/blob/master/dual_flags.ino

#include <avr/pgmspace.h>  // Needed to store stuff in Flash using PROGMEM
#include <FastLED.h>       // Fastled library to control the LEDs
// How many leds are connected?
#define NUM_LEDS 375
// Define the Data Pin
#define DATA_PIN 2  // Connected to the data pin of the first LED strip
// Define the array of leds
CRGB leds[NUM_LEDS];
// Define Colors
#define Red       0xFF0000
#define White     0xFFFFFF
#define Blue      0x0000FF
#define Green     0x00FF00
#define Black     0x000000
#define Yellow    0xFFFF00
int Counter = 0; // added to use as the flag counter
uint32_t flag_USA[15][25] = {
  {  White, Blue, White, Blue, White, Blue, White, Blue, White, Blue, White, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, }, // row 1
  {  White, White, White, White, White, White, White, White, White, White, White, White, White, White, Blue, White, Blue, White, Blue, White, Blue, White, Blue, White, Blue, },  // row 2
  {  White, Blue, White, Blue, White, Blue, White, Blue, White, Blue, White, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, Red, }, // row 3

This file has been truncated. show original

anon57585045 · April 3, 2020, 11:52pm

Please post the code as an attachment if it is too big.

mouseketier · April 3, 2020, 11:54pm

I have attached the code

dual_flags.ino (9.32 KB)

anon57585045 · April 4, 2020, 12:00am

Yes, you are treating 'row' as a global variable but it is not ever declared as such. It is only defined once in a for statement in loop():

  for (int row = 0; row < 15; row++) {

I don't wish to delve into your logic to learn your intentions, so it's up to you to decide what the best correction would be. Caution: if you do declare a 'row' globally, it won't be the same 'row' variable used in the scope of the for loop.

Also, the humongous array could be in separate file in your folder, included in your sketch with an #include. It appears as a separate tab in the IDE.

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"row" was not declared in this scope

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