@file:Suppress("UNREACHABLE_CODE")

package com.coding.camerausingcamerax

import android.os.Bundle
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import com.coding.camerausingcamerax.databinding.ActivityContNumberBinding
import java.util.Scanner
import kotlin.math.pow

class ContNumber : AppCompatActivity() {
    var csc:String = ""
    private val contnumBinding: ActivityContNumberBinding by lazy {
        ActivityContNumberBinding.inflate(layoutInflater)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(contnumBinding.root)
        contnumBinding.btnTakePhoto.setOnClickListener{
            //main("ZEPU00372545")
            /*val isValid = isValidContainerNumber(contnumBinding.ContNum.text.toString())

            // Print the result.
            if (isValid) {
                println("The container number is valid.")
                Toast.makeText(this, "ok", Toast.LENGTH_LONG).show()
            } else {
                println("The container number is invalid.")
                Toast.makeText(this, "sai so cont", Toast.LENGTH_LONG).show()
            }*/
            if (validateContainerNumber("ZEPU0037254","5")==true) {
                /*val intent = Intent(this@ContNumber, MainActivity::class.java)
                intent.putExtra("Container Number", contnumBinding.ContNum.text.toString())
                startActivity(intent)*/
                Toast.makeText(this, "ok", Toast.LENGTH_LONG).show()
            }else{
                Toast.makeText(this, "nhap sai so cont", Toast.LENGTH_LONG).show()
            }
        }

    }
    fun validateContainerNumber(containerNumber: String, checkDigit: String): Boolean {

            // Check if the container number and check digit are strings

            // Check if the container number has 11 characters
            if (containerNumber.length != 11) {
                return false
            }
            // Calculate the check digit using ISO 6346 standard
            val alphabet = "0123456789A?BCDEFGHIJK?LMNOPQRSTU?VWXYZ"
            var sum = 0
            for (i in 0 until 10) {
                val char = containerNumber[i]
                val pos = alphabet.indexOf(char)
                if (pos == -1) {
                    return false
                }
                sum += (pos * 2.0.pow(i)).toInt()
            }
            val remainder = sum % 11
            val checkDigitValue = if (remainder == 10) "0" else remainder.toString()
            // Compare the calculated check digit with the provided check digit
            return checkDigitValue == checkDigit
            Toast.makeText(this, checkDigitValue, Toast.LENGTH_LONG).show()

    }
    
    }


}

Kotlin online compiler

Write, Run & Share Kotlin code online using OneCompiler’s Kotlin online compiler for free. It’s a modern and fast online playground for Kotlin, supporting the latest version and ideal for learning, experimenting, and sharing code instantly.

About Kotlin

Kotlin is a statically typed, modern programming language developed by JetBrains. It runs on the JVM and is fully interoperable with Java. Kotlin is concise, expressive, and safe, and it’s officially supported by Google for Android app development.

Sample Code

The following is a simple Kotlin program that prints a greeting:

fun main() {
    println("Hello, OneCompiler!")
}

Taking inputs (stdin)

OneCompiler’s Kotlin editor supports stdin. You can provide input using the I/O tab. Here's a sample program that reads a line of input and prints a greeting:

fun main() {
    print("Enter your name: ")
    val name = readLine()
    println("Hello, $name")
}

Syntax Basics

Variables

val name: String = "OneCompiler"  // Immutable
var age: Int = 25                 // Mutable

Kotlin supports type inference, so explicit types are optional:

val city = "Hyderabad"
var count = 10

Conditionals

val score = 85
if (score >= 50) {
    println("Pass")
} else {
    println("Fail")
}

Loops

For loop

for (i in 1..5) {
    println(i)
}

While loop

var i = 1
while (i <= 5) {
    println(i)
    i++
}

Do-While loop

var j = 1
do {
    println(j)
    j++
} while (j <= 5)

Functions

fun add(a: Int, b: Int): Int {
    return a + b
}

fun greet(name: String) = "Hello, $name"

Collections

val items = listOf("apple", "banana", "cherry")
for (item in items) {
    println(item)
}

This guide provides a quick reference to Kotlin programming syntax and features. Start coding in Kotlin using OneCompiler’s Kotlin online compiler today!