Question

b. Compute the weighted sum of digits of a number read from the keyboard in the following sense: Let us calculate sum of digits multiplying each digit by its position (counting from the left, starting from 1). For example, given the value 1971 we calculate such weighted sum of digits (let us call it "wsd") as: wsd(1971) = 1 * 1 + 9 * 2 + 7 * 3 + 1 * 4 = 41

I need in Java program

Answer 1

Dear Student,

below i written the Java code as per the requirement.Please note that the given example output is incorrect. The wsd would be 44.

Please note the below program has been tested on ubuntu 16.04 system and compiled using javac compiler. This code will also work on code blocks.

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Program:

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import java.util.Scanner;

//public class

public class Weighted_Sum

{
//this is the main class

public static void main(String args[])

{

//variables

int count = 0, num;

Scanner in = new Scanner(System.in);

System.out.println("Enter a num: ");

num = in.nextInt();

//create an array to store the digits

int [] digit = new int[100];

//while loop to find the digits and store into an array

while(num>0)

{

digit[count] = num%10;

num = num/10;

count++;

}

System.out.println(count);

int mul = 1, wsd = 0;

for(int i = count-1; i>=0; i--)

{

//calculate weighted sum

wsd = wsd + digit[i] * mul;

mul++;

}

//display wsd

System.out.println("Weigted sum is = "+wsd);

}

}

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Sample Output:

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KIndly Check and Verify Thanks..!!!