exit status 1 Error compiling for board Arduino/Genuino Uno.

Hey guys, i want to make a weight display with potentio, still in progress and i got stuck in program.
Before i add this program, i can make 2 lcd on with 2 i2c and displaying variable of potentio and keypad input. But after i add this program, its error and i dont know where i wrong. Please help
This is my code

#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
const byte numRows= 4; //baris pada keypad
const byte numCols= 4; //Kolom pada keypad

/keymap mendefinisikan tombol ditekan sesuai
dengan baris dan kolom seperti muncul pada keypad
/
char keymap[numRows][numCols]=
{
{‘1’, ‘2’, ‘3’, ‘A’},
{‘4’, ‘5’, ‘6’, ‘B’},
{‘7’, ‘8’, ‘9’, ‘C’},
{’*’, ‘0’, ‘#’, ‘D’}
};

byte rowPins[numRows]= {9,8,7,6};
byte colPins[numCols]= {5,4,3,2};

Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, colPins, numRows, numCols);

LiquidCrystal_I2C lcd1(0x3F ,2,1,0,4,5,6,7,3, POSITIVE); //Inisialisasi LCD 1
LiquidCrystal_I2C lcd2(0x27 ,2,1,0,4,5,6,7,3, POSITIVE); //Inisialisasi LCD 2
int pot=A0; //inisial pin slide potentiometer
String var1_str="";
String var2_str="";
char operator1=’ ';
int var1=0;
int var2=0;
boolean is_var1=true;
void setup() {
Serial.begin(9600); //
lcd1.begin(16,2);
lcd1.clear();
lcd2.begin(16,2);
lcd2.clear();
pinMode(pot, INPUT);
}

void loop(){
int data = analogRead(pot);
float konversi = ((data (2028.0/1014.0))-28);//konversi nilai potentio menjadi skala timbangan
lcd1.setCursor(0,0);
lcd1.print(“Berat beban”);
lcd1.setCursor(0,1);
lcd1.print(konversi);
lcd1.setCursor(12,1);
lcd1.print(“gram”);
//LCD2
char key = myKeypad.getKey();// inisialisasi keyped sebagai tampilan character
if (key)
{
if(key == ‘#’){// ‘#’ berfungsi untuk membersihkan layar
lcd2.setCursor(0,1);
lcd2.clear(); //membersihkan layar
var1_str="";
var2_str="";
operator1=’ ';
var1=0;
var2=0;
}
//memasukkan input operan
__if((key != '
’)&&(key != ‘#’)){__
if((is_var1)&&(operator1== ’ ')){
//menyimpan input ke dalam suatu string
var1_str += key;
lcd2.setCursor(0,1);
lcd2.print(key);//menampilkan bilangan
}else{
is_var1=false;//apabila is_var 1 bernilai false
var2_str += key;// maka string akan dikumpulkan pada var2_str
lcd2.setCursor(0,1);
lcd2.print(key);

}
}
}
}
the bold word are the program i add and made error all of program.
I want to make a calculation program to 1 lcd and another lcd for displaying potentio.
At the end i want to calculate the input of keypad with potentio output in 1 lcd.
Please help :slightly_frowning_face:

how does is_var1 get set back to "true" after being set to false?

So i change it to True or should i erase that else program?

not clear what you're trying to do with the new code and you haven't described what the "error" is?

not sure if the error is a compiler error or if the code simply doesn't do what you expect or if there's simply a problem when a key is pressed.

it's not clear what the new code is attempting to do.