這個(gè)怎么錯(cuò)了？
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;
??int avg = sum/4;
??int minus = age1-age2;
??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);
?}
}
2017-03-10
要的是自減后，你那是自增！
2017-03-10
int newAge=age1--;
2017-03-10
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;
??int avg = sum/4;
??int minus = age1-age2;?
??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);
?}
}
2017-03-10
int newAge = age1++的后面少了個(gè)分號(hào)