日期:2020/1/14
功能:从键盘读取若干个实数,以-1结束
IDE:Intellij IDEA
package testDemo;
import java.util.Scanner;
public class ReadKey {
public static void main(String[] args){
double sum=0;
int count=0;
Scanner scanner = new Scanner(System.in);
double key = scanner.nextDouble();
while(key!=-1){
sum+=key;
count++;
key = scanner.nextDouble();
}
System.out.println("平均数:"+sum/count);
}
}