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  • 1016 因子之和

     1 // Test1016-因子之和.cpp: 定义控制台应用程序的入口点。
     2 //
     3 #include "stdafx.h"
     4 
     5 int factor[100] = {};
     6 int index = 0;
     7 int isPerfect(int num)
     8 {
     9     int equal = 0;
    10     index = 0;
    11     for (int i = 1; i <= num / 2+1; i++)
    12     {
    13         if (num % i == 0)
    14         {
    15             equal += i;
    16             factor[index++] = i;
    17         }
    18     }
    19     if (equal == num)
    20         return 1;
    21     else
    22         return 0;
    23 }
    24 int main()
    25 {
    26     int num;
    27     scanf_s("%d", &num);
    28 
    29     for (int i = 2; i <= num; i++)
    30     {
    31         if (isPerfect(i) == 1)
    32         {
    33             printf("%d its factors are ", i);
    34             for (int j = 0; j < index; j++)
    35                 printf("%d ", factor[j]);
    36             printf("
    ");
    37             index = 0;
    38         }
    39     }
    40     return 0;
    41 }

    结果

    1 10000
    2 6 its factors are 1 2 3
    3 28 its factors are 1 2 4 7 14
    4 496 its factors are 1 2 4 8 16 31 62 124 248
    5 8128 its factors are 1 2 4 8 16 32 64 127 254 508 1016 2032 4064
    6 请按任意键继续. . .

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  • 原文地址:https://www.cnblogs.com/kongchung/p/9330450.html
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