how to make a library for using a large code in single line?

Projects Programming
1

can i use library so that i dont have to type a large code,
for that the code look small.
for example

if(a=='b')
{
digitalwrite(led,LOW);
}
if(a=='c')
{
digitalwrite(led1,LOW);
}
...
...
...if(a=='n')
{
digitalwrite(ledn,LOW)//upto n time

can it be type in single line of program?
if yes then how please give suggestions.

2

If you are going to use exactly that sequence of tests in several programs then it may be worth putting it in a function accessible to multiple programs whether or not you regard that as a library.

If, on the other hand, the code is only going to be used once then it is a waste of time. From the small section of code provided, the most economical way of implementing it would seem to be a couple of arrays or a struct but more detail is required

Please explain what exactly you are doing

3

A shorter version:

  switch (a)
  {
    case 'b': digitalwrite(led, LOW); break;
    case 'c': digitalwrite(led1, LOW); break;
    .
    .
    .
    case 'n': digitalwrite(ledn, LOW); break;
  }

And another way using arrays:

const char Values[] = {'b', 'c', ... 'n'};  // Or "bc...n"
const byte ValCount = sizeof Values / sizeof Values[0];
const byte LEDPins[ValCount] = {led, led1, ... ledn};


  for (int i = 0; i < ValCount; i++)
  {
    if (a == Values[i])
      digitalWrite(LEDPins[i], LOW);
  }
1 Like
4

Don’t forget that it can be harder to debug if you go for very short code too.

5

Raj7912:
can it be type in single line of program?

You can define a function to do all the work and call the function in one line. For example you could define the function like this:

void TurnOffMatchingLED(char match)
{
  switch (match)
  {
    case 'b': digitalwrite(led, LOW); break;
    case 'c': digitalwrite(led1, LOW); break;
    .
    .
    .
    case 'n': digitalwrite(ledn, LOW); break;
  }
}

And call the function like this:

  TurnOffMatchingLED(a);
1 Like