pftyf9mxk/jjcc2.txt

package cn.csj.oo3;

import java.util.Scanner;

public class jjcc {
	
	 static void sum(double a, double b) {
		double resum=a+b;
		System.out.println(a+"+"+b+"="+resum);
	}
	
	static void subtraction(double a,double b) {
		double resub=a-b;
		System.out.println(a+"-"+b+"="+resub);
	}
	
	static void mul(double a,double b) {
		double remul=a*b;
		System.out.println(a+"*"+b+"="+remul);
	}
	
	static void division(double a,double b) {
		double redivision=0;
		if(b!=0) {
			redivision=a/b;
		}
		else {
			redivision=0;   /*表示错误*/
		}
		System.out.println(a+"÷"+b+"="+redivision);
	}

}