这是我需要回答的功课问题。
编写一个完整的程序,声明一个从0到100的任意五个整数的数组,并且只对那些大于70的整数求平均值。
这是我到目前为止编写的代码。
import java.util.Random;
public class TestLoop{
public static void main(String[] args){
Random Rnum = new Random();
int[] ar1 = new int[100];
for(int i = 0; i < 5; i++) {
ar1[i] = Rnum.nextInt(100);
System.out.print(ar1[i] + " ");
if(ar1[i] > 70)
System.out.print(ar1[i] + " ");
}
}
}
这允许我得到我的五个随机数,但我似乎无法弄清楚如何平均那些将超过70的数字。最后几行代码是我试图孤立的数字其他70多个不是。
答案 0 :(得分:0)
试试这个:
public static void main(String[] args){
Random Rnum = new Random();
int[] ar1 = new int[100];
int counter=0;
double total=0;
for(int i = 0; i < 5; i++) {
ar1[i] = Rnum.nextInt(100);
System.out.print(ar1[i] + " ");
if(ar1[i] > 70)
{
total+=ar1[i];
counter++;
System.out.print(ar1[i] + " ");
}
}
if(counter>0)
{
double average=total/counter;
System.out.println("average="+average);
}
}
答案 1 :(得分:0)
您可以简单地跟踪70以上的数字以及它们的总和。 public static void main(String [] args){ 随机Rnum = new Random();
//added variables
int count = 0;
int average = 0;
int[] ar1 = new int[100];
for(int i = 0; i < 5; i++) {
ar1[i] = Rnum.nextInt(100);
System.out.print(ar1[i] + " ");
if(ar1[i] > 70)
// increment count
count++;
// add the number greater than 70 to the average
average += ar[i];
System.out.print(ar1[i] + " ");
}
//once out of the loop devide the sum of all //integers greater than 70 (stored in average) by //the number of integers that were greater than 70 (stored in count)
平均=平均/计数;
的System.out.println(平均); }