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(2)Èç¹ûn <> k£¬µ«nÄܱ»kÕû³ý£¬ÔòÓ¦´òÓ¡³ökµÄÖµ£¬²¢ÓÃn³ýÒÔkµÄÉÌ,×÷ΪеÄÕýÕûÊýÄãn,ÖØ¸´Ö´ÐеÚÒ»²½¡£

(3)Èç¹ûn²»Äܱ»kÕû³ý£¬ÔòÓÃk+1×÷ΪkµÄÖµ,ÖØ¸´Ö´ÐеÚÒ»²½¡£ import java.util.*;

public class lianxi04{

public static void main(String[] args) { Scanner s = new Scanner(System.in);

System.out.print( \Çë¼üÈëÒ»¸öÕýÕûÊý: \ int n = s.nextInt(); int k=2;

System.out.print(n + \ while(k <= n) {

if(k == n) {System.out.println(n);break;}

else if( n % k == 0) {System.out.print(k + \ else k++; } } }

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ÌâÄ¿£ºÀûÓÃÌõ¼þÔËËã·ûµÄǶÌ×À´Íê³É´ËÌ⣺ѧϰ³É¼¨> =90·ÖµÄͬѧÓÃA±íʾ£¬60-89·ÖÖ®¼äµÄÓÃB±íʾ£¬60·ÖÒÔϵÄÓÃC±íʾ¡£ import java.util.*; public class lianxi05 {

public static void main(String[] args) { int x;

char grade;

Scanner s = new Scanner(System.in); System.out.print( \ÇëÊäÈëÒ»¸ö³É¼¨: \ x = s.nextInt(); grade = x >= 90 ? 'A' : x >= 60 ? 'B' :'C';

System.out.println(\µÈ¼¶Îª£º\ } }

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ÌâÄ¿£ºÊäÈëÁ½¸öÕýÕûÊýmºÍn£¬ÇóÆä×î´ó¹«Ô¼ÊýºÍ×îС¹«±¶Êý¡£

/**ÔÚÑ­»·ÖУ¬Ö»Òª³ýÊý²»µÈÓÚ0£¬ÓýϴóÊý³ýÒÔ½ÏСµÄÊý£¬½«Ð¡µÄÒ»¸öÊý×÷ΪÏÂÒ»ÂÖÑ­»·µÄ´óÊý£¬È¡µÃµÄÓàÊý×÷ΪÏÂÒ»ÂÖÑ­»·µÄ½ÏСµÄÊý£¬Èç´ËÑ­»·Ö±µ½½ÏСµÄÊýµÄֵΪ0£¬·µ»Ø½Ï´óµÄÊý£¬´ËÊý¼´Îª×î´ó¹«Ô¼Êý£¬×îС¹«±¶ÊýΪÁ½ÊýÖ®»ý³ýÒÔ×î´ó¹«Ô¼Êý¡£* / import java.util.*;

public class lianxi06 {

public static void main(String[] args) { int a ,b,m;

Scanner s = new Scanner(System.in); System.out.print( \¼üÈëÒ»¸öÕûÊý£º \ a = s.nextInt();

System.out.print( \ÔÙ¼üÈëÒ»¸öÕûÊý£º \ b = s.nextInt();

deff cd = new deff(); m = cd.deff(a,b); int n = a * b / m;

System.out.println(\×î´ó¹«Ô¼Êý: \ System.out.println(\×îС¹«±¶Êý: \} }

class deff{

public int deff(int x, int y) { int t;

if(x < y) { t = x; x = y; y = t; }

while(y != 0) { if(x == y) return x; else {

int k = x % y; x = y; y = k; } }

return x; } }

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ÌâÄ¿£ºÊäÈëÒ»ÐÐ×Ö·û£¬·Ö±ðͳ¼Æ³öÆäÖÐÓ¢ÎÄ×Öĸ¡¢¿Õ¸ñ¡¢Êý×ÖºÍÆäËü×Ö·ûµÄ¸öÊý¡£ import java.util.*; public class lianxi07 {

public static void main(String[] args) { int digital = 0; int character = 0; int other = 0; int blank = 0;

char[] ch = null;

Scanner sc = new Scanner(System.in); String s = sc.nextLine(); ch = s.toCharArray();

for(int i=0; i= '0' && ch <= '9') { digital ++;

} else if((ch >= 'a' && ch <= 'z') || ch > 'A' && ch <= 'Z') { character ++;

} else if(ch == ' ') { blank ++; } else { other ++; } }

System.out.println(\Êý×Ö¸öÊý: \

System.out.println(\Ó¢ÎÄ×Öĸ¸öÊý: \ System.out.println(\¿Õ¸ñ¸öÊý: \ System.out.println(\ÆäËû×Ö·û¸öÊý:\} }

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ÌâÄ¿£ºÇós=a+aa+aaa+aaaa+aa...aµÄÖµ£¬ÆäÖÐaÊÇÒ»¸öÊý×Ö¡£ÀýÈç2+22+222+2222+22222(´Ëʱ¹²ÓÐ5¸öÊýÏà¼Ó)£¬¼¸¸öÊýÏà¼ÓÓмüÅÌ¿ØÖÆ¡£ import java.util.*; public class lianxi08 {

public static void main(String[] args) { long a , b = 0, sum = 0;

Scanner s = new Scanner(System.in); System.out.print(\ÊäÈëÊý×ÖaµÄÖµ£º \ a = s.nextInt();

System.out.print(\ÊäÈëÏà¼ÓµÄÏîÊý£º\ int n = s.nextInt(); int i = 0;

while(i < n) { b = b + a;

sum = sum + b; a = a * 10; ++ i; }

System.out.println(sum); } }

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ÌâÄ¿£ºÒ»¸öÊýÈç¹ûÇ¡ºÃµÈÓÚËüµÄÒò×ÓÖ®ºÍ£¬Õâ¸öÊý¾Í³ÆÎª \ÍêÊý \¡£ÀýÈç6=1£«2£«3.±à

³Ì ÕÒ³ö1000ÒÔÄÚµÄËùÓÐÍêÊý¡£ public class lianxi09 {

public static void main(String[] args) {

System.out.println(\µ½1000µÄÍêÊýÓУº \ for(int i=1; i<1000; i++) { int t = 0;

for(int j=1; j<= i/2; j++) { if(i % j == 0) { t = t + j; } }

if(t == i) {

System.out.print(i + \\ } } }

¡¾³ÌÐò10¡¿ ÌâÄ¿£ºÒ»Çò´Ó100Ã׸߶È×ÔÓÉÂäÏ£¬Ã¿´ÎÂ䵨ºó·´Ìø»ØÔ­¸ß¶ÈµÄÒ»°ë£»ÔÙÂäÏ£¬ÇóËüÔÚ µÚ10´ÎÂäµØÊ±£¬¹²¾­¹ý¶àÉÙÃ×£¿µÚ10´Î·´µ¯¶à¸ß£¿ public class lianxi10 {

public static void main(String[] args) { double h = 100,s = 100; for(int i=1; i<10; i++) { s = s + h; h = h / 2; }

System.out.println(\¾­¹ý·³Ì£º\ System.out.println(\·´µ¯¸ß¶È£º\} }

¡¾³ÌÐò11¡¿ ÌâÄ¿£ºÓÐ1¡¢2¡¢3¡¢4ËĸöÊý×Ö£¬ÄÜ×é³É¶àÉÙ¸ö»¥²»ÏàͬÇÒÎÞÖØ¸´Êý×ÖµÄÈýλÊý£¿¶¼ÊǶàÉÙ£¿ public class lianxi11 {

public static void main(String[] args) { int count = 0;

for(int x=1; x<5; x++) { for(int y=1; y<5; y++) { for(int z=1; z<5; z++) {

if(x != y && y != z && x != z) { count ++;

System.out.println(x*100 + y*10 + z ); } } }