有1、2、3、4个数字，能组成多少个互不相同且无重复数代码,Java代码库,德仔网

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【Java】有1、2、3、4个数字，能组成多少个互不相同且无重复数

作者:Dezai.CN / 发布于2011/3/25/ 415

程序分析：可填在百位、十位、个位的数字都是1、2、3、4。组成所有的排列后再去掉不满足条件的排列。

<div><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">class</span><span style="color: #000000"> Wanshu {
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> main(String[] args)
{
 </span><span style="color: #0000ff">int</span><span style="color: #000000"> i</span><span style="color: #000000">=</span><span style="color: #000000">0</span><span style="color: #000000">;
 </span><span style="color: #0000ff">int</span><span style="color: #000000"> j</span><span style="color: #000000">=</span><span style="color: #000000">0</span><span style="color: #000000">;
 </span><span style="color: #0000ff">int</span><span style="color: #000000"> k</span><span style="color: #000000">=</span><span style="color: #000000">0</span><span style="color: #000000">;
 </span><span style="color: #0000ff">int</span><span style="color: #000000"> t</span><span style="color: #000000">=</span><span style="color: #000000">0</span><span style="color: #000000">;
 </span><span style="color: #0000ff">for</span><span style="color: #000000">(i</span><span style="color: #000000">=</span><span style="color: #000000">1</span><span style="color: #000000">;i</span><span style="color: #000000"><=</span><span style="color: #000000">4</span><span style="color: #000000">;i</span><span style="color: #000000">++</span><span style="color: #000000">)
 </span><span style="color: #0000ff">for</span><span style="color: #000000">(j</span><span style="color: #000000">=</span><span style="color: #000000">1</span><span style="color: #000000">;j</span><span style="color: #000000"><=</span><span style="color: #000000">4</span><span style="color: #000000">;j</span><span style="color: #000000">++</span><span style="color: #000000">)
 </span><span style="color: #0000ff">for</span><span style="color: #000000">(k</span><span style="color: #000000">=</span><span style="color: #000000">1</span><span style="color: #000000">;k</span><span style="color: #000000"><=</span><span style="color: #000000">4</span><span style="color: #000000">;k</span><span style="color: #000000">++</span><span style="color: #000000">)
 </span><span style="color: #0000ff">if</span><span style="color: #000000">(i</span><span style="color: #000000">!=</span><span style="color: #000000">j </span><span style="color: #000000">&&</span><span style="color: #000000"> j</span><span style="color: #000000">!=</span><span style="color: #000000">k </span><span style="color: #000000">&&</span><span style="color: #000000"> i</span><span style="color: #000000">!=</span><span style="color: #000000">k)
 {t</span><span style="color: #000000">+=</span><span style="color: #000000">1</span><span style="color: #000000">;
 System.out.println(i</span><span style="color: #000000">*</span><span style="color: #000000">100</span><span style="color: #000000">+</span><span style="color: #000000">j</span><span style="color: #000000">*</span><span style="color: #000000">10</span><span style="color: #000000">+</span><span style="color: #000000">k);
} 
 System.out.println (t);
 }
}
</span></div>

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