int minus=agel-age2; ? ? ?age1不是“L”

public?class?HelloWorld?{

????public?static?void?main(String[]?args)?{

????????int?age1?=?24;

????????int?age2?=?18;

????????int?age3?=?36;

????????int?age4?=?27;

????????int?sum?=?age1?+?age2?+?age3?+?age4;

????????//?double?avg=sum/4;?可以編譯，但是邏輯是錯(cuò)的，得到的是int轉(zhuǎn)成的double
????????double?avg?=?sum?/?4.0;

????????int?minus?=?age1?-?age2;?//?age1不是agel!

????????int?newAge?=?--age1;

????????System.out.println("年齡總和："?+?sum);

????????System.out.println("平均年齡："?+?avg);

????????System.out.println("年齡差值："?+?minus);

????????System.out.println("自減后的年齡："?+?newAge);

????}

}

建議你換個(gè)字體以示區(qū)別

public class HelloWorld{

? ? public static void main(String[] args) {

int age1=24;

int age2=18;

int age3=36;

int age4=27;

? ?System.out.println("年齡總和："+sum);

? ? System.out.println("平均年齡："+avg);

System.out.println("年齡差值："+minus);

System.out.println("自減后的年齡："+newAge);

}

}

你好這是原代碼，我就是不知道錯(cuò)在那里了

age1-4是什么類型的