help me make program

Question

Create a program called "BUZZERS" that will input digits. Buzzers are computed according to the input. if the digit contains 0,6,7,5 it adds 1 and then otherwise it adds 2. Your input is from 0-9999999.Your program will output the total BUZZERS.

EXAMPLE TEST CASE 1:

input number: 24789

output: 9

why 9? because 7 is 1 then 2489 is 2+2+2+2

============> 9

Test Case no.

input number: 2307

output: 6

Answer 1

You've already got some Java answers here, so here's some tangential inspiration in a functional language, Idris^[1]:

buzzer: String -> Int

buzzer x = sum$ unpack x <&> \digit =>

if elem digit ['0','6','7','5'] then 1 else 2

main: IO ()

main = getLine >>= printLn . buzzer

tests: List Bool

tests = [

buzzer "24789" == 9 ,

buzzer "2307" == 6 ]

The tests included above can be checked like so:

idris2 --no-banner Buzzers.idr <<< tests

Let the conciseness of this code in contrast with Java be some inspiration for studying functional programming!

[1] https://idris-lang.org

Answer 2

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

System.out.println("Enter Number: ");

Scanner in = new Scanner(System.in);

if (in.hasNextInt()) {

String input = in.nextLine();

char[] numberToProcess = input.toCharArray();

int finalValue = 0;

for (char digit : numberToProcess) {

int intDigit = Integer.parseInt(String.valueOf(digit));

switch (intDigit) {

case 0:

case 5:

case 6:

case 7:

finalValue++;

break;

default:

finalValue = finalValue + 2;

}

}

System.out.println(finalValue);

} else {

System.out.println("Input value is not an integer");

}

}

}

Answer 3

/*

This is one way to solve. Below approach converts the digits into a String, then iterates thru the String and checks if each digit in the String "0675" (or not) and updates the buzzer var appropriately. Note, using array of test cases instead of user input. Replaced a few lines with placeholders in "<>".

*/

public class Buzzers {

public static void main(String[] args) {

// Used array of test cases instead of user input. Replace with use of Scanner class for user input

int testCases[] = { 24789, 2307, 6750, 8888, 9999999, 7, 123489 };

for (int testCaseCount = 0; testCaseCount < testCases.length; testCaseCount++) {

int digits = testCases[testCaseCount];

int buzzers = 0;

// Convert to a String

String digitsAsString = String.valueOf(digits);

// Iterate thru the String of digits

<CREATE FOR LOOP TO ITERATE THRU DIGITS> {

// get the next char from the String of digits

char nextChar = <GET NEXT CHAR FROM STRING OF DIGITS>

// check if we should add 1 or 2

if (<CHECK IF NEXT CHAR NOT IN THE STRING "0675">) {

// not found, so add 2

buzzers += 2;

} else {

buzzers += 1;

}

}

System.out.println(String.format("For Test Case %s(%d), number of buzzers: %d", testCaseCount + 1,

testCases[testCaseCount], buzzers));

}

}

}