大家来用JAVA来算这个啊

BartonZhang · 发表于 2003-7-17 18:04:18

（）×（）（）（）=（）（）（）（）
即一位数乘以三位数等于四位数
（）中填12345678中的任一个
不能重复
小学2年级的题目

用JAVA编个程序

我自己编了一个:
public class count{
  public static void main (String args[]){
int a=1,b=1,c=1;
String out = "result"
for (a=1;a<9;a++)
  for (b=1;b<999;b++)
for (c=1;c<9999;c++)
if (a+b=c)
  Syetem.out.println (out+"a="+a+"b="+b+"c="+c);
}
}
左看右看都错到哪里去都不知道了.
真郁闷,作为高中生,这种算法都不会....

Leaves · 发表于 2003-7-17 18:06:22

我没学JAVA,那不是更惨呀!!!

wsm · 发表于 2003-7-17 18:14:42

回家给你一个 wait a while!

rianren · 发表于 2003-7-17 23:58:28

左看右看你的程序就是

不对劲!

rianren · 发表于 2003-7-18 00:06:44

要求说清楚些行吗? 俺都是菜鸟!

liverbird · 发表于 2003-7-18 07:27:22

再研究

satan_vensu · 发表于 2003-7-18 08:25:04

内循环里有重复数字！

wsm · 发表于 2003-7-18 09:43:10

昨天又被老板留下来没时间今天早上作了一下（好像我程序里允许的数字是0-9和这里稍有不同阿）结果列表：
*this2*793=1586hahahahahahaha

*this2*853=1706hahahahahahaha

*this2*654=1308hahahahahahaha

*this2*685=1370hahahahahahaha

*this2*835=1670hahahahahahaha

*this2*845=1690hahahahahahaha

*this2*865=1730hahahahahahaha

*this2*935=1870hahahahahahaha

*this2*936=1872hahahahahahaha

*this2*679=1358hahahahahahaha

*this2*769=1538hahahahahahaha

*this3*582=1746hahahahahahaha

*this3*594=1782hahahahahahaha

*this3*625=1875hahahahahahaha

*this3*695=2085hahahahahahaha

*this3*805=2415hahahahahahaha

*this3*905=2715hahahahahahaha

*this3*915=2745hahahahahahaha

*this3*906=2718hahahahahahaha

*this3*916=2748hahahahahahaha

*this3*568=1704hahahahahahaha

*this3*658=1974hahahahahahaha

*this3*918=2754hahahahahahaha

*this3*609=1827hahahahahahaha

*this3*819=2457hahahahahahaha

*this4*392=1568hahahahahahaha

*this4*792=3168hahahahahahaha

*this4*695=2780hahahahahahaha

*this4*715=2860hahahahahahaha

*this4*795=3180hahahahahahaha

*this4*815=3260hahahahahahaha

*this4*376=1504hahahahahahaha

*this4*396=1584hahahahahahaha

*this4*576=2304hahahahahahaha

*this4*596=2384hahahahahahaha

*this4*756=3024hahahahahahaha

*this4*796=3184hahahahahahaha

*this4*876=3504hahahahahahaha

*this4*926=3704hahahahahahaha

*this4*956=3824hahahahahahaha

*this4*517=2068hahahahahahaha

*this4*907=3628hahahahahahaha

*this4*918=3672hahahahahahaha

*this4*519=2076hahahahahahaha

*this4*579=2316hahahahahahaha

*this4*709=2836hahahahahahaha

*this4*789=3156hahahahahahaha

*this4*819=3276hahahahahahaha

*this4*879=3516hahahahahahaha

*this5*372=1860hahahahahahaha

*this5*682=3410hahahahahahaha

*this5*762=3810hahahahahahaha

*this5*782=3910hahahahahahaha

*this5*832=4160hahahahahahaha

*this5*862=4310hahahahahahaha

*this5*872=4360hahahahahahaha

*this5*962=4810hahahahahahaha

*this5*972=4860hahahahahahaha

*this5*413=2065hahahahahahaha

*this5*813=4065hahahahahahaha

*this5*923=4615hahahahahahaha

*this5*963=4815hahahahahahaha

*this5*973=4865hahahahahahaha

*this5*364=1820hahahahahahaha

*this5*384=1920hahahahahahaha

*this5*764=3820hahahahahahaha

*this5*784=3920hahahahahahaha

*this5*436=2180hahahahahahaha

*this5*476=2380hahahahahahaha

*this5*826=4130hahahahahahaha

*this5*417=2085hahahahahahaha

*this5*437=2185hahahahahahaha

*this5*617=3085hahahahahahaha

*this5*697=3485hahahahahahaha

*this5*827=4135hahahahahahaha

*this5*927=4635hahahahahahaha

*this5*937=4685hahahahahahaha

*this5*967=4835hahahahahahaha

*this5*328=1640hahahahahahaha

*this5*438=2190hahahahahahaha

*this5*478=2390hahahahahahaha

*this5*628=3140hahahahahahaha

*this5*728=3640hahahahahahaha

*this5*329=1645hahahahahahaha

*this5*369=1845hahahahahahaha

*this5*629=3145hahahahahahaha

*this5*729=3645hahahahahahaha

*this5*769=3845hahahahahahaha

*this6*512=3072hahahahahahaha

*this6*582=3492hahahahahahaha

*this6*902=5412hahahahahahaha

*this6*912=5472hahahahahahaha

*this6*972=5832hahahahahahaha

*this6*293=1758hahahahahahaha

*this6*453=2718hahahahahahaha

*this6*703=4218hahahahahahaha

*this6*903=5418hahahahahahaha

*this6*913=5478hahahahahahaha

*this6*284=1704hahahahahahaha

*this6*304=1824hahahahahahaha

*this6*514=3084hahahahahahaha

*this6*485=2910hahahahahahaha

*this6*715=4290hahahahahahaha

*this6*307=1842hahahahahahaha

*this6*817=4902hahahahahahaha

*this6*358=2148hahahahahahaha

*this6*418=2508hahahahahahaha

*this6*718=4308hahahahahahaha

*this6*289=1734hahahahahahaha

*this6*309=1854hahahahahahaha

*this6*529=3174hahahahahahaha

*this7*802=5614hahahahahahaha

*this7*902=6314hahahahahahaha

*this7*912=6384hahahahahahaha

*this7*693=4851hahahahahahaha

*this7*803=5621hahahahahahaha

*this7*843=5901hahahahahahaha

*this7*893=6251hahahahahahaha

*this7*904=6328hahahahahahaha

*this7*205=1435hahahahahahaha

*this7*235=1645hahahahahahaha

*this7*385=2695hahahahahahaha

*this7*405=2835hahahahahahaha

*this7*415=2905hahahahahahaha

*this7*605=4235hahahahahahaha

*this7*615=4305hahahahahahaha

*this7*915=6405hahahahahahaha

*this7*456=3192hahahahahahaha

*this7*586=4102hahahahahahaha

*this7*208=1456hahahahahahaha

*this7*308=2156hahahahahahaha

*this7*458=3206hahahahahahaha

*this7*209=1463hahahahahahaha

*this7*409=2863hahahahahahaha

*this7*589=4123hahahahahahaha

*this7*859=6013hahahahahahaha

*this8*512=4096hahahahahahaha

*this8*592=4736hahahahahahaha

*this8*742=5936hahahahahahaha

*this8*932=7456hahahahahahaha

*this8*942=7536hahahahahahaha

*this8*703=5624hahahahahahaha

*this8*753=6024hahahahahahaha

*this8*953=7624hahahahahahaha

*this8*634=5072hahahahahahaha

*this8*674=5392hahahahahahaha

*this8*704=5632hahahahahahaha

*this8*754=6032hahahahahahaha

*this8*794=6352hahahahahahaha

*this8*954=7632hahahahahahaha

*this8*245=1960hahahahahahaha

*this8*345=2760hahahahahahaha

*this8*465=3720hahahahahahaha

*this8*615=4920hahahahahahaha

*this8*915=7320hahahahahahaha

*this8*906=7248hahahahahahaha

*this8*916=7328hahahahahahaha

*this8*926=7408hahahahahahaha

*this8*307=2456hahahahahahaha

*this8*407=3256hahahahahahaha

*this8*537=4296hahahahahahaha

*this8*459=3672hahahahahahaha

*this8*469=3752hahahahahahaha

*this8*579=4632hahahahahahaha

*this8*679=5432hahahahahahaha

*this9*402=3618hahahahahahaha

*this9*412=3708hahahahahahaha

*this9*512=4608hahahahahahaha

*this9*602=5418hahahahahahaha

*this9*702=6318hahahahahahaha

*this9*712=6408hahahahahahaha

*this9*603=5427hahahahahahaha

*this9*204=1836hahahahahahaha

*this9*804=7236hahahahahahaha

*this9*814=7326hahahahahahaha

*this9*834=7506hahahahahahaha

*this9*205=1845hahahahahahaha

*this9*305=2745hahahahahahaha

*this9*705=6345hahahahahahaha

*this9*715=6435hahahahahahaha

*this9*805=7245hahahahahahaha

*this9*845=7605hahahahahahaha

*this9*206=1854hahahahahahaha

*this9*306=2754hahahahahahaha

*this9*806=7254hahahahahahaha

*this9*836=7524hahahahahahaha

*this9*207=1863hahahahahahaha

*this9*647=5823hahahahahahaha

*this9*408=3672hahahahahahaha

*this9*418=3762hahahahahahaha

*this9*608=5472hahahahahahaha

*this9*638=5742hahahahahahaha

wsm · 发表于 2003-7-18 09:44:39

代码不算什么好算法不过算起来也不用1秒钟就不再优化了
public void testmainfun(){ // i*k|_|j = _|_|_|_;
int i,j,k,l;
for (i=2;i<10;i++){
   num_arr[0] = i;
   for(j=2;j<10;j++){
      if (j!=i){
      num_arr[3] = j;
      num_arr[7] = (i*j)%10;
if (num_arr[7] == i||num_arr[7] == j)
         continue;
      for(k=1;(k<10);k++){
         if ((k>10/i)&&(k!=i)&&(k!=j)&&k!=num_arr[7]){
            num_arr[1] = k;
            for (l=0;l<10;l++){
            if (l!=i&&l!=j&&l!=k&&l!=num_arr[7]){
               num_arr[2] = l;
               if (test_code()){
                  System.out.print("*this");
                  output();
               }
            }
            }
         }
      }
      }
   }
}
  }

  public boolean test_code(){
int i = 0;
i = num_arr[0]*(num_arr[3]+10*num_arr[2]+100*num_arr[1]);
if (i/1000 != num_arr[0]&&i/1000 != num_arr[1]&&i/1000 != num_arr[2]&&i/1000 != num_arr[3]&&i/1000 != num_arr[7]){
   num_arr[4] = i/1000;
   i = i%1000;
   if (i / 100 != num_arr[0] && i / 100 != num_arr[1] &&
      i / 100 != num_arr[2] && i / 100 != num_arr[3] && i/100 != num_arr[7] && i/100 != num_arr[4]) {
      num_arr[5] = i/100;
      i = i%100;
      if (i / 10 != num_arr[0] && i / 10 != num_arr[1] && i / 10 != num_arr[2] &&
         i / 10 != num_arr[3] && i/10 != num_arr[7] && i/10 != num_arr[4] && i/10 != num_arr[5]) {
      num_arr[6] = i/10;
      i = i%10;
      return true;
      }
   }
}
return false;
  }

  public void output(){
System.out.print(num_arr[0]);
System.out.print('*');
System.out.print(num_arr[1]);
System.out.print(num_arr[2]);
System.out.print(num_arr[3]);
System.out.print('=');
System.out.print(num_arr[4]);
System.out.print(num_arr[5]);
System.out.print(num_arr[6]);
System.out.print(num_arr[7]);
System.out.println("hahahahahahaha");
  }

stonewell · 发表于 2003-7-18 09:55:19

#include <stdio.h>

int
main()
{
for(int firstNumber = 2;firstNumber < 9;firstNumber ++)
{
int secondNumberStart = 10 / firstNumber;

if (secondNumberStart == 0) secondNumberStart = 1;

for(int secondNumber = secondNumberStart;secondNumber < 9;secondNumber ++)
for(int thirdNumber = 1;thirdNumber < 9;thirdNumber ++)
for(int forthNumber = 1;forthNumber < 9;forthNumber ++)
{
if ((firstNumber == secondNumber) ||
(firstNumber == thirdNumber) ||
(firstNumber == forthNumber) ||
(secondNumber == forthNumber) ||
(secondNumber == thirdNumber) ||
(thirdNumber == forthNumber))
{
}
else
{
int result = firstNumber * (secondNumber * 100 + thirdNumber * 10 + forthNumber);

if (result > 999)
{
int selectedNumber[4] = {firstNumber,secondNumber,thirdNumber,forthNumber};
int resultNumber[4] = {result / 1000,result / 100 % 10,result / 10 % 10,result % 10};

bool found = true;

if ((resultNumber[0] == resultNumber[1]) ||
(resultNumber[0] == resultNumber[2]) ||
(resultNumber[0] == resultNumber[3]) ||
(resultNumber[1] == resultNumber[2]) ||
(resultNumber[1] == resultNumber[3]) ||
(resultNumber[2] == resultNumber[3]))
{
found = false;
}

if (found)
{
for(int i=0;i<4;i++)
{
if ((resultNumber == 0) ||
(resultNumber == 9))
{
found = false;
break;
}
else
{
for(int k=0;k<4;k++)
{
if (resultNumber == selectedNumber[k])
{
found = false;
}
}
}
}
}

if (found)
{
printf("(%d) * (%d)(%d)(%d)=(%d)(%d)(%d)(%d)\n",
firstNumber,secondNumber,thirdNumber,forthNumber,
resultNumber[0],resultNumber[1],resultNumber[2],resultNumber[3]);
}
}
}
}
}

return 0;
}

c的应该和java差不多

wsm · 发表于 2003-7-18 10:11:49

楼上的也是按0-9算得吧能不能吧结果列一下对比验证以下如果我们的一样可靠性就大一点了现在也不知道是否有遗漏的阿
另外这么纯的编程贴姿居然流落在水区...

rianren · 发表于 2003-7-18 11:09:04

唉, 编程太难,有没有比较好的, 这样写好长的程序!

BartonZhang · 发表于 2003-7-18 11:16:18

........看这么巧妙的程序，竟然被我写成这样子，真是太惭愧了

BartonZhang · 发表于 2003-7-18 11:19:35

[quote:cd865f1e63="wsm"]楼上的也是按0-9算得吧能不能吧结果列一下对比验证以下如果我们的一样可靠性就大一点了现在也不知道是否有遗漏的阿
另外这么纯的编程贴姿居然流落在水区...[/quote]

哎呀，一时按快了点

wsm · 发表于 2003-7-18 11:29:47

这个该是原题的解了：
this is 3*582=1746haha

this is 3*625=1875haha

this is 3*658=1974haha

this is 5*437=2185haha

this is 5*827=4135haha

this is 6*582=3492haha

this is 6*453=2718haha

this is 6*358=2148haha

this is 7*235=1645haha

this is 7*385=2695haha

this is 7*456=3192haha

this is 8*742=5936haha

this is 8*674=5392haha

this is 8*537=4296haha

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