C语言实现【关机程序】

在讲解关机程序前，必须得先知道一个库函数system("shutdown -s -t 60")和system("shutdown -a)，其中“shutdown -s”表示关机，“shutdown -a”表示取消关机，“-t 60”表示延迟60秒；而要使用该库函数就得引头文件#include<stdlib.h>。

下面开始实现关机程序了：

<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span><span class="token string">&lt;stdio.h&gt;</span></span> <span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span><span class="token string">&lt;stdlib.h&gt;</span></span> <span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span><span class="token string">&lt;string.h&gt;</span></span> <span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span> <span class="token keyword">char</span> input<span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">]</span> <span class="token operator">&#61;</span> <span class="token punctuation">{<!-- --></span> <span class="token number">0</span> <span class="token punctuation">}</span><span class="token punctuation">;</span> <span class="token function">system</span><span class="token punctuation">(</span><span class="token string">&#34;shutdown -s -t 60&#34;</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">do</span> <span class="token punctuation">{<!-- --></span> <span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">&#34;你的电脑将在一分钟后关机&#xff0c;如果输入&#xff1a;我是猪。就取消关机&#xff01;\n请输入&#xff1a;&#34;</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token function">scanf</span><span class="token punctuation">(</span><span class="token string">&#34;%s&#34;</span><span class="token punctuation">,</span> input<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">strcmp</span><span class="token punctuation">(</span>input<span class="token punctuation">,</span> <span class="token string">&#34;我是猪&#34;</span><span class="token punctuation">)</span> <span class="token operator">&#61;&#61;</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span> <span class="token function">system</span><span class="token punctuation">(</span><span class="token string">&#34;shutdown -a&#34;</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">break</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">&#34;输入错误&#xff01;&#xff01;\n&#34;</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token punctuation">}</span>

#include<stdio.h> #include<stdlib.h> #include<string.h> int main() { char input[20] = { 0 }; system("shutdown -s -t 60"); do { printf("你的电脑将在一分钟后关机，如果输入：我是猪。就取消关机！\n请输入："); scanf("%s", input); if (strcmp(input, "我是猪") == 0) { system("shutdown -a"); break; } printf("输入错误！！\n"); } while (1); return 0; }

如果你想搞恶作剧，就把程序咖到你舍友的电脑的服务器上👀。