import java.util.Scanner;
public class Complex2Test {
    public static void main(String[] args) {
        double a,b,c,d;
        char op;
        String s2 = null;
        for(;;){
            Scanner scan = new Scanner(System.in);
            System.out.println("请输入第一个实部:");
            a = scan.nextDouble();
            System.out.println("请输入第一个虚部:");
            b = scan.nextDouble();
            System.out.println("请输入第二个实部:");
            c = scan.nextDouble();
            System.out.println("请输入第二个虚部:");
            d = scan.nextDouble();
            System.out.println("选择运算类型: (+ - * / >)");
            String s = scan.next();
            op = s.charAt(0);
            Complex2 C = new Complex2(a,b,c,d);
            switch (op){
                case '+':s2 = C.Add();break;
                case '-':s2 = C.Sub();break;
                case '*':s2 = C.Mul();break;
                case '/':s2 = C.Div();break;
                case '>':s2 = C.Com();break;
                default:break;
            }
            System.out.println(s2);
        }
    }
}