题解 | #完全数计算#
完全数计算
https://www.nowcoder.com/practice/7299c12e6abb437c87ad3e712383ff84
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 int a = in.nextInt(); int num = 2; int eq = 1; int count=0; for (int i = 3; i < a; i++) { while (num < i) { if (i % num == 0) { eq = eq + num; num++; } else { num++; } } if(eq==i){ count++; } eq=1; num=2; } System.out.print(count); } }