接受月份的名字，返回这个月份的数字代码,C代码库,德仔网

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【C】接受月份的名字，返回这个月份的数字
作者:Dezai.CN / 发布于2011/7/8/ 478
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，首加逗号。然后在s中查找monthname，找到后记录第一个字母的位置。
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程序思想： 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，首加逗号。然后在s中查找monthname，找到后记录第一个字母的位置。
再调用刚开始写的第一个函数count_str。
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<pre><div><span style="color: #008000">/*</span><span style="color: #008000">月份的名字转数字</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">int</span><span style="color: #000000"> count_str(</span><span style="color: #0000ff">string</span><span style="color: #000000"> maxstr, </span><span style="color: #0000ff">string</span><span style="color: #000000"> minstr);</span><span style="color: #0000ff">int</span><span style="color: #000000"> monthnum(</span><span style="color: #0000ff">string</span><span style="color: #000000"> monthname){    </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"> i</span><span style="color: #000000">=</span><span style="color: #800080">0</span><span style="color: #000000">;    i </span><span style="color: #000000">=</span><span style="color: #000000"> s.find(monthname);    </span><span style="color: #0000ff">return</span><span style="color: #000000"> count_str(s.substr(</span><span style="color: #800080">0</span><span style="color: #000000">,i), </span><span style="color: #800000">"</span><span style="color: #800000">,</span><span style="color: #800000">"</span><span style="color: #000000">);}</span></div></pre>
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测试程序的代码：
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<pre><div><span style="color: #000000">/</span><span style="color: #000000">monthnumtext.cpp#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">int</span><span style="color: #000000"> monthnum(</span><span style="color: #0000ff">string</span><span style="color: #000000"> monthname);</span><span style="color: #0000ff">int</span><span style="color: #000000"> main(){    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">January</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">February</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">March</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">April</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">May</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">June</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">July</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">August</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">Spetember</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">October</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">November</span><span style="color: #800000">"</span><span style="color: #000000">) </span><span style="color: #000000"><<</span><span style="color: #000000"> endl;    cout </span><span style="color: #000000"><<</span><span style="color: #000000"> monthnum(</span><span style="color: #800000">"</span><span style="color: #800000">December</span><span style="color: #800000">"</span><span style="color: #000000">) </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">[hanxi@hanxi</span><span style="color: #000000">-</span><span style="color: #000000">workstation Documents]$ g</span><span style="color: #000000">++</span><span style="color: #000000"> findstr.cpp monthnum.cpp monthnumtext.cpp </span><span style="color: #000000">-</span><span style="color: #000000">o mo[hanxi@hanxi</span><span style="color: #000000">-</span><span style="color: #000000">workstation Documents]$ .</span><span style="color: #000000">/</span><span style="color: #000000">mo</span><span style="color: #800080">1</span><span style="color: #000000"></span><span style="color: #800080">2</span><span style="color: #000000"></span><span style="color: #800080">3</span><span style="color: #000000"></span><span style="color: #800080">4</span><span style="color: #000000"></span><span style="color: #800080">5</span><span style="color: #000000"></span><span style="color: #800080">6</span><span style="color: #000000"></span><span style="color: #800080">7</span><span style="color: #000000"></span><span style="color: #800080">8</span><span style="color: #000000"></span><span style="color: #800080">9</span><span style="color: #000000"></span><span style="color: #800080">10</span><span style="color: #000000"></span><span style="color: #800080">11</span><span style="color: #000000"></span><span style="color: #800080">12</span></div></pre>
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