Question

You can multiply two numbers 'm' and 'n' by repeated addition method.

For example, 5 * 3 = 15 can be performed by adding 5 three times ⇒ 5 + 5 + 5 = 15. Similarly, successive subtraction of two numbers produces 'Quotient' and 'Remainder' when a number 'a' is divided by 'b' (a > b). 
For example, 5/2 ⇒ Quotient = 2 and Remainder = 1

Follow steps shown below:

Process	Result	Counter
5 − 2	3	1
3 − 2	1	2

Sample Output: The last counter value represents 'Quotient' ⇒ 2
The last result value represents 'Remainder' ⇒ 1

Write a program to accept two numbers. Perform multiplication and division of the numbers as per the process shown above by using switch case statement.

Answer 1

import java.util.*;
public class Q17
{ public static void main(String az[])
{int a, b, x, res = 0, Q = 0, j;
Scanner scn = new Scanner(System.in);
System.out.println("***Multiplication/Division of Integers***");
System.out.println("1. Multiplication");
System.out.println("2. Division"); .
System.out.printin("Enter your choice 1 (or) 2 ");
switch (scn.nextInt())
{case 1: // Multiplication is Repeated Addition
System.out.print("Enter the multiplicand: ");
a = scn.nextInt();
System.out.print("Enter the multiplier: ");
b = scn.nextInt();
for (int i = 1; i <= b; i++)
res = res + a;
System.out.println(a + " * " + b + " = " + res);
break;

case 2: // Division Is Repeated Subtraction
System.out.print("Enter the dividend: "); 
a = scn.nextlnt();
System.out.print("Enter the divisor: ");
b = scn.nextInt();
while (a >= 0)
{if ((a − b) < 0)
break;
a = a - b;
Q++;
}
System.out.printIn("Quotient = " + Q + "\t" + "Remainder = " + a);
break; 

default: System.out.printin("Invalid entry!");
}
}}