Complex_Number.txt

Complex Number Problem
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A ComplexNumber class contains two data members : one is the real part (R) and the other is imaginary (I) (both integers).
Implement the Complex numbers class that contains following functions -
1. constructor
You need to create the appropriate constructor.
2. plus -
This function adds two given complex numbers and updates the first complex number.
e.g.
if C1 = 4 + i5 and C2 = 3 +i1
C1.plus(C2) results in: 
C1 = 7 + i6 and C2 = 3 + i1
3. multiply -
This function multiplies two given complex numbers and updates the first complex number.
e.g.
if C1 = 4 + i5 and C2 = 1 + i2
C1.multiply(C2) results in: 
C1 = -6 + i13 and C2 = 1 + i2
4. print -
This function prints the given complex number in the following format :
a + ib
Note : There is space before and after '+' (plus sign) and no space between 'i' (iota symbol) and b.
Input Format :
Line 1 : Two integers - real and imaginary part of 1st complex number
Line 2 : Two integers - real and imaginary part of 2nd complex number
Line 3 : An integer representing choice (1 or 2) (1 represents plus function will be called and 2 represents multiply function will be called)
Output format :
Check details of 'print' function given above.
Sample Input 1 :
4 5
6 7
1
Sample Output 1 :
10 + i12
Sample Input 2 :
4 5
6 7
2
Sample Output 2 :
-11 + i58


/******************
 * Following is the main function we are using internally.
 * Refer this for completing the ComplexNumbers class
 * 
 
 public static void main(String[] args) {
		Scanner s = new Scanner(System.in);

		int real1 = s.nextInt();
		int imaginary1 = s.nextInt();

		int real2 = s.nextInt();
		int imaginary2 = s.nextInt();

		ComplexNumbers c1 = new ComplexNumbers(real1, imaginary1);
		ComplexNumbers c2 = new ComplexNumbers(real2, imaginary2);

		int choice = s.nextInt();
		 
		if(choice == 1) {
			// Add
			c1.plus(c2);
			c1.print();
		}
		else if(choice == 2) {
			// Multiply
			c1.multiply(c2);
			c1.print();
		}
		else {
			return;
		}
	}
 ******************/

public class ComplexNumbers {
	// Complete this class
    private int real;
    private int imag;
    
    ComplexNumbers(){
        
    }
    
    ComplexNumbers(int real, int imag){
        this.real = real;
        this.imag = imag;
    }
    
    public void plus(ComplexNumbers c2){
        this.real = this.real + c2.real;
        this.imag = this.imag + c2.imag;
    }
    
    public void multiply(ComplexNumbers c2){
        int x = this.real;  // Here x is used coz when real is updated, that updated value will be used in calc imag value after multiplication.
        this.real = (this.real * c2.real) - (this.imag * c2.imag); 
        this.imag = (x * c2.imag) + (this.imag * c2.real);
    }
    
    public void print(){
        System.out.print(this.real + " + i" + this.imag);
    }
	
}