package xs1;

import java.util.Scanner;

public class cal4 {
		public cal4() {
			Scanner inScanner=new Scanner(System.in);
			System.out.print("请输入第一位运算数：");
			double a=inScanner.nextInt();
			System.out.print("请输入第二位运算数：");
			double b=inScanner.nextInt();
			System.out.print("请输入将要运算的运算符：");
			String op=inScanner.next();
			char ch=op.charAt(0);
			double sum=cala(a, b, ch);
			System.out.println("结果为:"+sum);
		}
		
		public static double cala(double x,double y,char op) {
			switch (op) {
			case '+': return x+y;
			case '-': return x-y;
			case '*': return x*y;
			case '/': 
				if(y==0) return 0;
				else return x/y;
			default:
				return x;
			}
		}
}