import java.text.DecimalFormat;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
String condition = "";
Test test= new Test();
do{
Scanner scanner = new Scanner(System.in);
try{
System.out.print("请输入第一个数:");
double a = scanner.nextDouble();
System.out.print("请输入第二个数:");
double b = scanner.nextDouble();
System.out.print("请输入运算符:");
String s = scanner.next();
char c = s.charAt(0);
test.yunsuan(a, b, c);
}catch(Exception e){
System.out.println("请输入正确的数据!");
}
System.out.print("是否继续?Y:继续,任意字符:结束");
condition = scanner.next();
}while("Y".equals(condition));
}
public static void yunsuan(double a,double b,Character c){
DecimalFormat r=new DecimalFormat();
r.applyPattern("#0.00");
if(c.equals('+')){
System.out.println(a+"+"+b+"=" + r.format((a+b)));
} else if(c.equals('-')){
System.out.println(a+"-"+b+"=" + r.format((a-b)));
} else if(c.equals('*')){
System.out.println(a+"*"+b+"=" + r.format((a*b)));
} else if(c.equals('/')){
if(b==0){
System.out.println("被除数不能为0");
} else{
System.out.println(a+"/"+b+"=" + r.format((a/b)));
}
}else{
System.out.println("无法识别改运算符");
}
}
}
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我的结对伙伴 06 刘泽豪http://www.cnblogs.com/wsnd/