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1¡¢ Ò»¸öÊýÈç¹ûÇ¡ºÃµÈÓÚÆäÒò×Ó£¨³ýÁ˱¾ÉíÒÔÍâµÄÔ¼ÊýÖ®ºÍ£©£¬¸ÃÊý¾Í³ÆÎª“ÍêÊý”¡£±àдһ¸ö Java Application  ³ÌÐò£¬Çó³ö 1000 ÒÔÄÚµÄËùÓÐÍêÊý¡£
 
public class homework11
{
public static void main(String[] args)
//Êä³ö1000ÒÔÄÚµÄËùÓÐÍêÊý
{
int sum;                                       
System.out.print( "**********1000ÒÔÄÚµÄËùÓÐÍêÊýÈçÏÂ:");
System.out.println(); //»»ÐÐ
for(int i = 1; i <= 1000; i++)
{
    sum=0;//³õʼ»¯sum±äÁ¿£¬²¢ÔÚÿ¸öiµÄforµÄÑ­»·ºóʹsumÖµ¹éÁã
    for(int j = 1; j < i; j++){
        if(i % j == 0) //È¡ÓàÊý
        sum = sum + j;//Çói³ýÁ˱¾ÉíÒÔÍâµÄËùÓÐÔ¼ÊýÖ®ºÍ
         } 
    if(sum == i) //ÅжÏiÊÇ·ñΪÍêÊý£¬¼´ÅжÏiÊÇ·ñµÈÓÚ³ýÁ˱¾ÉíÒÔÍâµÄÔ¼ÊýÖ®ºÍ
System.out.println( "-~-~-~-~-~-~-~-~-~-~-~-~-~-~~~~~"+i + "ÊÇÍêÊý");
//Êä³öÍêÊý
} //½áÊøforÑ­»·
System.out.println(); //»»ÐÐ
} //½áÊømainº¯Êý
}//½áÊøclass
 
ÔËÐнá¹û£º
D:\jdk\xi>javac homework11.java
D:\jdk\xi>java homework11
**********1000ÒÔÄÚµÄËùÓÐÍêÊýÈçÏÂ:
-~-~-~-~-~-~-~-~-~-~-~-~-~-~~~~~6ÊÇÍêÊý
-~-~-~-~-~-~-~-~-~-~-~-~-~-~~~~~28ÊÇÍêÊý
-~-~-~-~-~-~-~-~-~-~-~-~-~-~~~~~496ÊÇÍêÊý
 
 
 
2¡¢±àдһ¸ö³ÌÐò£¬°Ñ±äÁ¿ n µÄ³õʼֵÉèÖÃΪ 1678£¬È»ºóÀûÓóý·¨ÔËËãºÍÈ¡ÓàÔËËã°Ñ±äÁ¿µÄÿλÊý×Ö¶¼Ìá³öÀ´²¢´òÓ¡£¬Êä³ö½á¹ûΪ£º n £½ 1678
 
public class homework12 {
// ÏÔʾָ¶¨ÊýµÄÿһλÊý×Ö 
private void show() {
int n = 1678;                    //±äÁ¿ n µÄ³õʼֵÉèÖÃΪ 1678
int a,b,c,d;                  &nbs


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