平均值咋回事？他提示我平均值是26.0，咋弄啊？
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);
?}
}
2016-10-21
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=(int)sum/4;###################### 括號里面那個強制轉換
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);
}
2016-10-20
??? double avg = (double)sum/4;?? 試試，java規(guī)定：整數(shù)除以整數(shù)得出來還是整數(shù)???? 浮點數(shù)除以整數(shù)就可以得到浮點數(shù)
2016-10-17
double avg =sum/4;