XhstormR
上面你截的图有一行字 本课程编程练习请使用电脑登录 ,望采纳。更新: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;
int minus = age1 - age2;
int newAge = --age1;
System.out.println("年龄总和:" + sum);
System.out.println("平均年龄:" + avg);
System.out.println("年龄差值:" + minus);
System.out.println("自减后的年龄:" + newAge);
}
}代码以上。