接受月份的数字，返回这个月份的名字代码,C代码库,德仔网

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【C】接受月份的数字，返回这个月份的名字

作者:Dezai.CN / 发布于2011/7/8/ 620

使用字符串s存放1到12月的英文单词，每个单词用逗号隔开，首尾也加逗号，然后进入一个循环判断该月是那一个月，判断过程中， j存储月份名字开始字母的位置，i存放该月份名字后面的逗号的位置，找到月份的单词后就退出循环，最后返回字串。

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<pre><div><span style="color: #008000">/*</span><span style="color: #008000">数字转月份的名字</span><span style="color: #008000">*/</span><span style="color: #000000">#include </span><span style="color: #000000"><</span><span style="color: #0000ff">string</span><span style="color: #000000">></span><span style="color: #000000">#include </span><span style="color: #000000"><</span><span style="color: #000000">iostream</span><span style="color: #000000">></span><span style="color: #000000"></span><span style="color: #0000ff">using</span><span style="color: #000000"> </span><span style="color: #0000ff">namespace</span><span style="color: #000000"> std; </span><span style="color: #0000ff">string</span><span style="color: #000000"> monthname(</span><span style="color: #0000ff">int</span><span style="color: #000000"> monthnum){    </span><span style="color: #0000ff">string</span><span style="color: #000000"> s</span><span style="color: #000000">=</span><span style="color: #800000">"</span><span style="color: #800000">,January,February,March,April,May,June,July,August,Spetember,October,November,December,</span><span style="color: #800000">"</span><span style="color: #000000">;    </span><span style="color: #0000ff">int</span><span style="color: #000000"> count </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">;    </span><span style="color: #0000ff">int</span><span style="color: #000000"> i</span><span style="color: #000000">=</span><span style="color: #800080">0</span><span style="color: #000000">,j</span><span style="color: #000000">=</span><span style="color: #800080">0</span><span style="color: #000000">;    </span><span style="color: #0000ff">do</span><span style="color: #000000">    {        j </span><span style="color: #000000">=</span><span style="color: #000000"> i;</span><span style="color: #008000">//</span><span style="color: #008000">j存储月份名字开始字母的位置，i存放该月份名字后面的逗号的位置</span><span style="color: #008000"></span><span style="color: #000000">        i </span><span style="color: #000000">=</span><span style="color: #000000"> s.find(</span><span style="color: #800000">"</span><span style="color: #800000">,</span><span style="color: #800000">"</span><span style="color: #000000">,i</span><span style="color: #000000">+</span><span style="color: #800080">1</span><span style="color: #000000">);        count</span><span style="color: #000000">++</span><span style="color: #000000">;    }</span><span style="color: #0000ff">while</span><span style="color: #000000"> (count </span><span style="color: #000000">!=</span><span style="color: #000000"> monthnum);    </span><span style="color: #0000ff">return</span><span style="color: #000000"> s.substr(j</span><span style="color: #000000">+</span><span style="color: #800080">1</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: #800080">1</span><span style="color: #000000">);}</span></div></pre>
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测试程序代码：
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<pre><div><span style="color: #008000">//</span><span style="color: #008000">monthnametext.cpp</span><span style="color: #008000"></span><span style="color: #000000">#include </span><span style="color: #000000"><</span><span style="color: #000000">iostream</span><span style="color: #000000">></span><span style="color: #000000"></span><span style="color: #0000ff">using</span><span style="color: #000000"> </span><span style="color: #0000ff">namespace</span><span style="color: #000000"> std;</span><span style="color: #0000ff">string</span><span style="color: #000000"> monthname(</span><span style="color: #0000ff">int</span><span style="color: #000000"> monthnum);</span><span style="color: #0000ff">int</span><span style="color: #000000"> main(){    </span><span style="color: #0000ff">int</span><span style="color: #000000"> num </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800080">1</span><span style="color: #000000">;    </span><span style="color: #0000ff">for</span><span style="color: #000000"> (;num</span><span style="color: #000000"><=</span><span style="color: #800080">12</span><span style="color: #000000">;num</span><span style="color: #000000">++</span><span style="color: #000000">)    {        cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthname(num) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    }}</span></div></pre>
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编译过程和结果：
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<pre><div><span style="color: #000000"> $  g</span><span style="color: #000000">++</span><span style="color: #000000"> monthname.cpp monthnametext.cpp </span><span style="color: #000000">-</span><span style="color: #000000">o m $ .</span><span style="color: #000000">/</span><span style="color: #000000">mJanuaryFebruaryMarchAprilMayJuneJulyAugustSpetemberOctoberNovemberDecember</span></div></pre>
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