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C语言学习第二章T4
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<h2 id="题目-编程求一个三位数的个位、十位和百位"><a href="#题目-编程求一个三位数的个位、十位和百位" class="headerlink" title="题目:编程求一个三位数的个位、十位和百位"></a>题目:编程求一个三位数的个位、十位和百位</h2><h3 id="主要代码"><a href="#主要代码" class="headerlink" title="主要代码:"></a>主要代码:</h3><figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta"># <span class="meta-keyword">include</span> <span class="meta-string"><stdio.h> </span></span></span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span> <span class="params">(<span class="keyword">void</span>)</span> </span></span><br><span class="line"><span class="function"></span>{ </span><br><span class="line"> <span class="keyword">int</span> a,b,c,d; </span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"请输入一个三位数：\n"</span>); </span><br><span class="line"> <span class="built_in">scanf</span>(<span class="string">"%d"</span>,&a); </span><br><span class="line"> <span class="keyword">if</span> (a>=<span class="number">100</span> && a<<span class="number">1000</span>) </span><br><span class="line"> { </span><br><span class="line"> b = a/<span class="number">100</span>; </span><br><span class="line"> c = a/<span class="number">10</span> - b*<span class="number">10</span>; </span><br><span class="line"> d = a - b*<span class="number">100</span> - c*<span class="number">10</span>; </span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"百位数：%d \n\n"</span>,b); </span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"十位数：%d \n\n"</span>,c); </span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"个位数：%d \n\n"</span>,d); </span><br><span class="line"> } </span><br><span class="line"> <span class="keyword">else</span> </span><br><span class="line"> { </span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"error!\n"</span>); </span><br><span class="line"> } </span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><a id="more"></a>
<h3 id="运行结果"><a href="#运行结果" class="headerlink" title="运行结果:"></a>运行结果:</h3><p><img src="images/c/c2p1.png" alt></p>
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<div class="post-toc motion-element"><ol class="nav"><li class="nav-item nav-level-2"><a class="nav-link" href="#题目-编程求一个三位数的个位、十位和百位"><span class="nav-number">1.</span> <span class="nav-text">题目:编程求一个三位数的个位、十位和百位</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#主要代码"><span class="nav-number">1.1.</span> <span class="nav-text">主要代码:</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#运行结果"><span class="nav-number">1.2.</span> <span class="nav-text">运行结果:</span></a></li></ol></li></ol></div>
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var visitors = document.querySelector('.leancloud_visitors');
var url = visitors.getAttribute('id').trim();
var title = visitors.getAttribute('data-flag-title').trim();
Counter('get', `/classes/Counter?where=${JSON.stringify({ url })}`)
.then(response => response.json())
.then(({ results }) => {
if (results.length > 0) {
var counter = results[0];
Counter('put', '/classes/Counter/' + counter.objectId, { time: { '__op': 'Increment', 'amount': 1 } })
.then(response => response.json())
.then(() => {
leancloudSelector(url).innerText = counter.time + 1;
})
.catch(error => {
console.log('Failed to save visitor count', error);
})
} else {
leancloudSelector(url).innerText = 'Counter not initialized! More info at console err msg.';
console.error('ATTENTION! LeanCloud counter has security bug, see how to solve it here: https://github.com/theme-next/hexo-leancloud-counter-security. \n However, you can still use LeanCloud without security, by setting `security` option to `false`.');
}
})
.catch(error => {
console.log('LeanCloud Counter Error', error);
});
}
} else {
function showTime(Counter) {
var visitors = document.querySelectorAll('.leancloud_visitors');
var entries = [...visitors].map(element => {
return element.getAttribute('id').trim();
});
Counter('get', `/classes/Counter?where=${JSON.stringify({ url: { '$in': entries } })}`)
.then(response => response.json())
.then(({ results }) => {
if (results.length === 0) {
document.querySelectorAll('.leancloud_visitors .leancloud-visitors-count').forEach(element => {
element.innerText = 0;
});
return;
}
for (var i = 0; i < results.length; i++) {
var item = results[i];
var url = item.url;
var time = item.time;
leancloudSelector(url).innerText = time;
}
for (var i = 0; i < entries.length; i++) {
var url = entries[i];
var element = leancloudSelector(url);
if (element.innerText == '') {
element.innerText = 0;
}
}
})
.catch(error => {
console.log('LeanCloud Counter Error', error);
});
}
}
fetch('https://app-router.leancloud.cn/2/route?appId=l8bvleb0PFB0er4hTWo3bGL1-gzGzoHsz')
.then(response => response.json())
.then(({ api_server }) => {
var Counter = (method, url, data) => {
return fetch(`https://${api_server}/1.1${url}`, {
method: method,
headers: {
'X-LC-Id': 'l8bvleb0PFB0er4hTWo3bGL1-gzGzoHsz',
'X-LC-Key': 'vOPowrKK83zOB6LhLKYOsGd1',
'Content-Type': 'application/json',
},
body: JSON.stringify(data)
});
};
if (CONFIG.page.isPost) {
const localhost = /http:\/\/(localhost|127.0.0.1|0.0.0.0)/;
if (localhost.test(document.URL)) return;
addCount(Counter);
} else if (document.querySelectorAll('.post-title-link').length >= 1) {
showTime(Counter);
}
});
</script>
</div>
</footer>
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