ãã1.æä¸ä¸ªäººçäºä¸ç§å¾ä¸¥éçç¾ç
ï¼å»çç»ä»å¼äºä¸¤ç§è¯çï¼åå«ç§°ä¸º A è¯çå B è¯çï¼æ¯ç§åå«ä¸º 4 çï¼æ¯å¤©å¿
é¡»å两次ï¼æ¯æ¬¡å¿
é¡»å A å B è¯çåä¸çï¼åºç°é误就ä¼æ»æï¼ç¬¬ä¸å¤©ï¼ä»æ£å¸¸åè¯ï¼ä½æ¯ï¼ç¬¬äºå¤©åè¯çæ¶åï¼ä»ä¸å°å¿æè¯çææ··äºï¼è¿ä¸¤ç§è¯ççå¤è§å®å
¨ä¸æ ·ï¼ä»ä¹æ²¡æå«çåæ³åè·åè¯çï¼é£ä¹ï¼ä»åºè¯¥æä¹åï¼
ããçæ¡
ããæå©ä¸çåçè¯å
¨é¨åå¼æ两åï¼ä¸åæ¾ä¸å ï¼å¦ä¸åæ¾å¦ä¸å ï¼ç¬¬äºå¤©æ¯æ¬¡åå
¶ä¸ä¸å å°±è¡äº
ãã2.5000çé¶ä¹æ«å°¾æå 个0
ããçæ¡ï¼
ãã1249个
ããå 为ä¸ä¸ª5çåæ°äº§çä¸ä¸ªé¶ï¼25çåæ°äº§çäºä¸ªé¶
ãã125çåæ°äº§çä¸ä¸ªé¶ï¼625çåæ°äº§çå个é¶
ãã3025产çäºä¸ªé¶ï¼åé¢è®¡ç®è¿çä¸è¯´ï¼é½æ¯åé¢çå¤äº§çä¸ä¸ªé¶
ãã5,10,15,...,5000 ä¸å
±1000个
ãã25,50,75,...,5000 å
±200个
ãã125,250,...,5000 å
±40个
ãã625,1250,...,5000 å
±8个
ãã3125 åªæ1个
ããæ以å
±æ1249个é¶
ãã3.ä¸å¤´æ¯çå¨3â10å²çæ¶åæ¯å¹´å¯ä»¥çä¸å¤´å°çï¼çå
¬çåæ¯ççæ¯çæ¯50%ï¼å¨ç12å²çæ¶åå°±éå
¥å± å®°åºä¹°äºãç°å¨æä¸ä¸ªå夫æ1头1å²å¤§çæ¯çï¼å¨æ¯ç3å²çæ¶åå°±éå°éè¿çååºå»é
ç§ï¼è¯·é®40å¹´åè¿ä¸ªå夫å¯è½ä¼æå¤å°å¤´çï¼ååºç¸å
³ç代ç æçé¢æè·¯ï¼æ好ç¨é¢å对象ã
ããçæ¡ï¼
ããJava代ç
ããpackage com.polaris.test;
ããimport java.util.*;
ãã/**
ãã* é®é¢æè¿°ï¼
ãã*
ãã* ä¸å¤´æ¯çå¨3â10å²çæ¶åæ¯å¹´å¯ä»¥çä¸å¤´å°çï¼çå
¬çåæ¯ççæ¯çæ¯50%ï¼
ãã* å¨ç12å²çæ¶åå°±éå
¥å± å®°åºä¹°äºãç°å¨æä¸ä¸ªå夫æ1头1å²å¤§çæ¯çï¼
ãã* å¨æ¯ç3å²çæ¶åå°±éå°éè¿çååºå»é
ç§ï¼è¯·é®40å¹´åè¿ä¸ªå夫å¯è½ä¼æå¤å°å¤´çï¼
ãã* ååºç¸å
³ç代ç æçé¢æè·¯ï¼æ好ç¨é¢å对象ã
ãã* @author polaris
http://www.beijixing001.comãã* @version 1.0
ãã*/
ããpublic class ComputeCattleNum {
ãã// ä¿åæææ¯ç
ããprivate static List<Cattle> cows = new ArrayList<Cattle>();
ãã// ä¿åææå½åå夫æ¥æçç
ããprivate static List<Cattle> cattles = new ArrayList<Cattle>();
ããpublic static void main(String[] args) {
ãã// 第ä¸å¤´æ¯ç
ããCattle cow = new Cattle(0,3);
ããcows.add(cow);
ãã// 40å¹´
ããfor(int i=0;i<40;++i) {
ãã// 大äºçäº12å²ççéå°å± å®°åºåæï¼åæ¶æ¯å¹´ï¼ææçç
ããfor(int j=0;j<cattles.size();++j) {
ããCattle temp = cattles.get(j);
ããif(temp.getDead()) {
ããcattles.remove(temp);
ãã}
ãã// å¼å§åªæä¸å¤´æ¯çªï¼å¹´é¾ä¸çé¿
ããif(i>0) {
ããcattles.get(j).grow();
ãã}
ãã}
ãã// æ¯ççå°ç
ããfor(int j=0;j<cows.size();++j) {
ããCattle calf = cows.get(j).bear();
ããif(calf!=null) {
ããif(calf.getSex()==0)
ããcows.add(calf);
ããcattles.add(calf);
ãã}
ãã}
ãã}
ããSystem.out.println("40å¹´åå夫æ¥æ" + cattles.size() + "头ç");
ãã}
ãã}
ããclass Cattle {
ãã// ççééï¼0代表éï¼1代表é
ããprivate int sex;
ãã// ççå¹´é¾
ããprivate int age;
ãã// æ¯å¦åæï¼å·²æ»ï¼
ããprivate boolean dead = false;
ããpublic Cattle(int sex, int age) {
ããthis.sex = sex;
ããthis.age = age;
ãã}
ãã/**
ãã* çå°ç
ãã* @return çåºçå°ç
ãã*/
ããpublic Cattle bear() {
ããCattle calf = null;
ããif(this.sex==0) {
ããif(this.age>=3 && this.age<=10) {
ããcalf = new Cattle(random(),0);
ãã} else {
ãã//System.out.println("æ±æï¼æ¤ç太å°æ太èï¼ä¸è½çè²ã");
ãã}
ãã} else {
ãã//System.out.println("æ没ææéï¼å
¬çä¹æ³è®©å®çå°çï¼");
ãã}
ããreturn calf;
ãã}
ããprivate int random() {
ããreturn (int)Math.round(Math.random());
ãã}
ãã/**
ãã* é¿å¤§ä¸å²ï¼å¦æå½å大äºçäº12å²ï¼ååæ
ãã*/
ããpublic void grow() {
ããif(this.age>=12) dead = true;
ããelse this.age++;
ãã}
ããpublic int getSex() {
ããreturn this.sex;
ãã}
ããpublic boolean getDead() {
ããreturn this.dead;
ãã}
ãã}
ãã4.å®´ä¼æ¡æ
ããå¨æ宾é¦çå®´ä¼å
éï¼æ4ä½æåæ£å´æ¡èåï¼ä¾ä¾èè°ãä»ä»¬ç¨äºä¸ãè±ãæ³ãæ¥4ç§è¯è¨ãç°å·²ç¥ï¼
ããAï¼ç²ãä¹ãä¸åä¼ä¸¤ç§è¯è¨ï¼ä¸åªä¼ä¸ç§è¯è¨ï¼
ããBï¼æä¸ç§è¯è¨4人ä¸æ3人é½ä¼ï¼
ããCï¼ç²ä¼æ¥è¯ï¼ä¸ä¸ä¼æ¥è¯ï¼ä¹ä¸ä¼è±è¯ï¼
ããDï¼ ç²ä¸ä¸ãä¸ä¸ä¸ä¸è½ç´æ¥äº¤è°ï¼ä¹ä¸ä¸å¯ä»¥ç´æ¥äº¤è°ï¼
ããEï¼ æ²¡æ人æ¢ä¼æ¥è¯ï¼åä¼æ³è¯ã
ãã请é®ï¼ç²ä¹ä¸ä¸åä¼ä»ä¹è¯è¨ï¼
ããçæ¡ï¼
ãã第ä¸é¢æ£è§£
ããç²ï¼ä¸æ¥
ããä¹ï¼ä¸æ³
ããä¸ï¼è±æ³
ããä¸ï¼ä¸
ãã5.åæºåè´¢
ããä»åæAãB两个ç¸é»çå½å®¶ï¼å®ä»¬çå
³ç³»å¾å¥½ï¼ä¸ä½äºç¸ä¹é´è´¸æ交å¾é¢ç¹ï¼è´§å¸å¯ä»¥éç¨ï¼æ±çä¹ç¸åãä¹å°±æ¯è¯´Aå½ç100å
çäºBå½ç100 å
ãå¯æ¯ä¸¤å½å
³ç³»å 为ä¸æ¬¡äºä»¶èç ´è£äºï¼è½ç¶è´¸æå¾æ¥ä»ç¶ç»§ç»ï¼ä½ä¸¤å½å½çå´äºç¸å®£å¸å¯¹æ¹è´§å¸ç100å
åªè½å
æ¢æ¬å½è´§å¸ç90å
ãæä¸ä¸ªèªæ人ï¼ä»æé åªæAå½ç100å
é票ï¼å´åæºæäºä¸å¤§æï¼åäºä¸ç¬æ¨ªè´¢ãè¯·ä½ æ³ä¸æ³ï¼è¿ä¸ªèªæ人æ¯ææ ·ä»ä¸åè´¢çï¼
ããçæ¡ï¼
ããæ¿çAå½100å¨Aå½æ¢å¥½Bå½çé±ï¼ç¶ååæ¿çæ¢å¥½çBå½çé±å»Bå½æ¢Aå½çé±
ããå¦æ¤å¾ªç¯
ãã6.快马å é
ãã墨西å¥åæç°å¨ä»ç¶å¯ä»¥çå°äººä»¬ç¨é©¬åé©´è¿è½½è´§ç©ãä¸ä½å人æåå¹é©¬ä»ç²ææå°ä¹æï¼èä»ç²æå°ä¹æï¼A马è¦è±ä¸å°æ¶ï¼B马è¦è±ä¸¤å°æ¶ï¼C马è¦è±åå°æ¶ï¼D马è¦è±äºå°æ¶ã
ããè¿ä½å人ä¸æ¬¡åªè½æ两å¹é©¬ï¼åæ¥æ¶ä»è¿è¦éªä¸å¹é©¬ï¼å
¶ä¸ä»¥èµ°å¾æ
¢çé£å¹é©¬ä½ä¸ºä»ç²ææå°ä¹ææéçæ¶é´ãå¬è¯´æ人è±äº12å°æ¶å°±æåå¹é©¬å
¨é¨ä»ç²ææå°ä¹æï¼è¯·é®ï¼ä»æ¯å¦ä½åå°çï¼
ããçæ¡ï¼
ããABä¸èµ·è¿Båæ¥ 4å°æ¶
ããCD ä¸èµ·è¿Aåæ¥ 6å°æ¶
ããAB ä¸èµ·è¿ 2å°æ¶
ããä¸å
±12å°æ¶
ãã7.å»é¼ æ
ããå»é¼ æ æ¯èµç°å¨å¼å§!åèµè
ææå°å¤«ãå¨å©åä¿ç½ã
ããæå°å¤«10ç§éè½å»10ä¸é¼ æ ï¼å¨å©20ç§éè½å»20ä¸é¼ æ ï¼ä¿ç½5ç§éè½å»5ä¸é¼ æ ã以ä¸å人æç¨çæ¶é´æ¯è¿æ ·è®¡ç®çï¼ä»ç¬¬ä¸å»å¼å§ï¼å°æåä¸å»ç»æã
ããä»ä»¬æ¯å¦æå¹³æï¼å¦æä¸æ¯ï¼è°æå
å»å®40ä¸é¼ æ ï¼
ããçæ¡ï¼
ããæå°å¤«
ããä¸ä¸ªå éç¶ååéçè¿ç¨ãä¸ä¸ªäººå¹³åé度ç¸çãè¾¾å°å¹³åé度æ¶é´å¨ä¸é´ç人å¯è½æ§æ大ã
ãã8.æè§
ããç¨ç¬¬ä¸æè§å¤æ8ï¼8=91è¿ä¸ªçå¼æ£ç¡®åï¼è¯´æçç±ã
ããçæ¡ï¼
ããä¸æ£ç¡®ã8+8=16
ãã9.è°è¯
ããå¦æä¸åæ¯ä¸ªäººè¯´çè¯é½æ¯åè¯ï¼é£ä¹æ¯è°æç¢äºè±ç¶ï¼
ããå¤å
ï¼åå§æç¢äºè±ç¶ã
ãã汤å§ï¼å¤å
ä¼åè¯ä½ è°æç¢äºè±ç¶ã
ããåæ®å°ï¼æ±¤å§ï¼å¤å
åæä¸å¤ªå¯è½æç¢è±ç¶ã
ããå
åæ¯ï¼æ没æç¢è±ç¶ã
ããè¾åå
ï¼å¤å
æç¢äºè±ç¶ï¼æ以汤å§ååæ®å°ä¸å¤ªå¯è½æç¢è±ç¶ã
ããåå§ï¼ææç¢äºè±ç¶ï¼æ±¤å§æ¯æ è¾çã
ããçæ¡ï¼å
åæ¯ãåå§çè¯æ两个æ¡ä»¶ï¼åªè¦ä¸ä¸ªä¸ºfalse就为falseã
ãã10.大æä½ä¸º
ããé²é夫ãè²å©æ®ãç½ä¼¯ç¹ä¸ä½éå¹´ï¼ä¸ä¸ªå½äºææï¼ä¸ä¸ªèä¸å¤§å¦ï¼ä¸ä¸ªå å
¥ç¾åéæéï¼ä¸ªä¸ªæªæ¥é½å¤§æä½ä¸ºãç°å·²ç¥ï¼
ããAï¼ ç½ä¼¯ç¹çå¹´é¾æ¯æ士ç大ï¼
ããBï¼ å¤§å¦ççå¹´é¾æ¯è²å©æ®å°ï¼
ããCï¼ é²é夫çå¹´é¾å大å¦ççå¹´é¾ä¸ä¸æ ·ã
ãã请é®ï¼ä¸ä¸ªäººä¸è°æ¯ææï¼è°æ¯å¤§å¦çï¼è°æ¯å£«å
括
ããææ å¤§å¦ ç¾åéæé
ããé²é夫 X true
ããè²å©æ® true X X
ããç½ä¼¯ç¹ true X
ããç±A B=ãç½ä¼¯ç¹æ¯è²å©æ®å°æ¯æ士大ãæ以è²å©æ®ä¸æ¯æ士
ãã11.麻çç工大å¦çå¦ç
ããç¾å½éº»çç大å¦çå¦çæ¥èªä¸åå½å®¶ã
ãã大å«ãæ¯å©ãç¹å¾·ä¸åå¦çï¼ä¸ä¸ªæ¯æ³å½äººï¼ä¸ä¸ªæ¯æ¥æ¬äººï¼ä¸ä¸ªæ¯ç¾å½äººãç°å·²ç¥ï¼
ãã1ã 大å«ä¸å欢é¢æ¡ï¼ç¹å¾·ä¸å欢æ±å ¡å
ï¼
ãã2ã å欢é¢æ¡çä¸æ¯æ³å½äººï¼
ãã3ã å欢æ±å ¡å
çæ¯æ¥æ¬äººï¼
ãã4ã æ¯å©ä¸æ¯ç¾å½äººã
ãã请æ¨æµåºè¿ä¸åçå¦çåå«æ¥èªåªäºå½å®¶ï¼
ããçæ¡ï¼
ããæ³å½äºº æ¥æ¬äºº ç¾å½äºº
ããå¤§å« true X
ããæ¯å© true X
ããç¹å¾· X true
ããå欢æ±å ¡çæ¯æ¥æ¬äººï¼ç¹å¾·ä¸å欢æ±å ¡=ãç¹å¾·ä¸æ¯æ¥æ¬äºº
ããå欢æ±å ¡çæ¯æ¥æ¬äººï¼æ以å欢é¢æ¡çå¯æå设ä¹ä¸æ¯æ¥æ¬äºº=ãç¾å½äººå欢é¢æ¡ï¼å¤§å«ä¸å欢é¢æ¡=ã大å«ä¹ä¸æ¯ç¾å½äººãæ以ç¹å¾·æ¯ç¾å½äºº
ããå欢é¢æ¡çä¸æ¯æ³å½äººå¯æå设ä¸å欢é¢æ¡çæ¯æ³å½äºº=ã大å«æ¯æ³å½äºº
ããæ以=ã æ¯å©æ¶æ¥æ¬äºº
ããç¶åå¨é£ä¸é¢å设çç»ææ¨ä¸ªå¤æåé¢æ¡ä»¶ãæ¯ä¸ªæ¡ä»¶é½ç¬¦åãæ以以ä¸å设æç«ã
ããå¦éæ´å¤(å
æ¬åç§é¢ç»ï¼ç¬ç»ï¼å æQQ:719116861ã注æjava!