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);
public class HelloWorld{
public static void main(String[] args) {
final char sex1 = '男';
final char sex2 = '女';
System.out.println("小明的性别是："+sex1+"\n"+"小红的性别是："+sex2);
}
}
话说视频咋没了？？？
