package 四则运算;
class Calculator{
private int num1;
private int num2;
private char option ;
public void initCalculator(int num1,int num2,char o) {
this.num1=num1;
this.num2=num2;
if(o==‘+‘||o==‘-‘||o==‘*‘||o==‘/‘) {
option = o;
}
else {
option = ‘+‘;
}
}
public void calculate() {
switch(option) {
case‘+‘:
System.out.println("做加法运算，结果是:"+(num1+num2));
case‘-‘:
System.out.println("做减法运算，结果是:"+(num1-num2));
case‘*‘:
System.out.println("做乘法运算,结果是:"+(num1*num2));
case‘/‘:
System.out.println("做除法运算，结果是:"+(num1/num2));
}
}
}
public class Dome1 {
public static void main(String[]args) {
System.out.println("狗蛋同学来做四则运算啦!");
Calculator c = new Calculator();
c.initCalculator(20, 10, ‘a‘);
c.calculate();
}
}
狗蛋同学来做四则运算啦！
原文：https://www.cnblogs.com/0929-luoyang/p/10817210.html
