lvalue required as left operand of assignment

:confused:

/*25.01.2017 tarihinde "Liseli" youtube kanalının sahibi olan Özgün Kara tarafından yazılmıştır. [email protected] */

#include <Servo.h> #include <Keypad.h> Servo kilit; #define buzzer 9 #define but1 10 #define but2 12 //bu üç yerde işimizi kolaylaştırmak için bunu yaptık.

const byte YATAY = 4; //4 yatay const byte DIKEY = 3; //3 dikey //keypad'i çizdik char tuslar[YATAY][DIKEY] = { {'1','2','3'}, {'4','5','6'}, {'7','8','9'}, {'*','0','#'} }; byte ytyPin[YATAY] = {2, 3, 4, 5}; //yatay pinleri bağladık byte dkyPin[DIKEY] = {6, 7, 8}; //dikey pinleri bağladık int sifre;

Keypad kilavye = Keypad( makeKeymap(tuslar), ytyPin, dkyPin, YATAY, DIKEY);

void setup() { kilit.attach(11); pinMode(buzzer, OUTPUT); pinMode(but1, OUTPUT); pinMode(but2, OUTPUT); }

void loop(){ char tus = kilavye.getKey();

if (tus = '1'){ sifre = sifre + 12; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '2'){ sifre = sifre + 23; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '3'){ sifre = sifre + 34; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '4'){ sifre = sifre + 45; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '5'){ sifre = sifre + 56; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '6'){ sifre = sifre + 67; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '7'){ sifre = sifre + 78; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '8'){ sifre = sifre + 89; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '9'){ sifre = sifre + 90; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '0'){ sifre = sifre + 1; digitalWrite(buzzer, HIGH); delay(100); digitalWrite(buzzer, LOW); } else if (tus = '*' && sifre = 191) { kilit.write(); digitalWrite(buzzer, HIGH); delay(400); digitalWrite(buzzer, LOW); sifre = 0; }

keypad__ifreli.ino (2.19 KB)

if (tus = '1') Not the cause of your error message, but incorrect.

As AWOL hinted, you need to learn the difference in C between the = and == operators. You've repeated the same mistake throughout the sketch.

I can't see the source of your error message. It mentions assignment, so I think maybe when you sort out the = / == problem, you may also fix the error message.

Also, there should be more to that error message, such as a line number where the problem occurs. Can you copy & paste the whole message to give us extra clues?

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COMMENTS

  1. "lvalue required as left operand of assignment " error

    When those C style guides tell you to lay off the C preprocessor, this is the kind of thing they're worried about. C++ - the "->" operator in C/C++ --> is not an operator.

  2. lvalue required as left operand of assignment

    Hello, I get lvalue required as left operand of assignment error when I wanted to check it. I do not know what it is. I am trying to make a keypad-servo door lock.