Filling array using serial print

Projects General Guidance
1

So im trying to make an empty array fill with the numbers printed in the serial monitor. I have a 4x4 keypad sending numbers into the serial monitor and i want to figure out how to make the numbers go into an empty array i have.

String passwrd[4] = {"0", "6", "4", "9"};
String passwrd2[4] = {};

Code^^^^ above is the 2 arrays i have, im gonna figure out how to check if they're the same, but thats a different can of worms

im very new to coding so lmk if its bad or not

2

It's bad.

Try reading the forum guide in the sticky post.

3

I don't think that the use of (an array of) String (capital S) makes sense.

char passwrd[4] = {'0', '6', '4', '9'};
char passwrd2[4];

if(memcmp(passwrd, passwrd2, sizeof(passwrd))
{
  no match
}

Or

// the array has space for the terminating nul character
char passwrd[5] = "0649";
char passwrd2[5];

if(strcmp(passwrd, passwrd2))
{
  no match
}

Not tested.

1 Like
4

Forget Strings. If you can understand this, you will be avoiding some extra work all over place:

char passwrd[4] = {3, 1, 4, 1};
char passwrd2[4] = {};

Learn about character arrays.

Which i didn't even use, unlike @sterretje. Either way.

a7

5

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.