JAVA从键盘输入2个数字,输出两个数字的“+、-、*、/、%”的运算表达式及运算结果

Answer 1

import java.util.Scanner;

public class Test01 {

public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
float num1,num2;
System.out.print("请输入两个数!\n第一个数:");
num1=scan.nextFloat();
System.out.print("第二个数:");
num2=scan.nextFloat();
System.out.println(num1+"+"+num2+"="+(num1+num2));
System.out.println(num1+"-"+num2+"="+(num1-num2));
System.out.println(num1+"*"+num2+"="+(num1*num2));
System.out.println(num1+"/"+num2+"="+(num1/num2));
System.out.println(num1+"%"+num2+"="+(num1%num2));
}

}

Answer 2

import java.util.Scanner;

public class Test1 {

public static void main(String[] args){

//以int类型为例
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
System.out.println(a+"+"+b+"="+(a+b));
System.out.println(a+"-"+b+"="+(a-b));
System.out.println(a+"*"+b+"="+(a*b));
if(b==0){
System.out.println("分母请不要输入0，否则除法和取余会出现异常！");
return;
}
System.out.println(a+"/"+b+"="+(a/b));
System.out.println(a+"%"+b+"="+(a%b));

}
}