feat: 添加C++支持 + 默认账号

Author: CodeJudge

backend/src/controllers/problemController.js

@@ -232,4 +232,31 @@ function getRandomUnsolved(req, res) {
   res.json({ problem });
 }
 
+function getSimilarProblems(req, res) {
+  const { id } = req.params;
+  const problem = queryOne('SELECT * FROM problems WHERE id = ?', [id]);
+  if (!problem) return res.status(404).json({ error: '题目不存在' });
+  const tags = (problem.tags || '').split(',').map(t => t.trim()).filter(Boolean);
+  let similar = [];
+  if (tags.length > 0) {
+    const likeClauses = tags.map(() => "tags LIKE ?");
+    const tagParams = tags.map(t => `%${t}%`);
+    similar = queryAll(
+      `SELECT id, title, type, difficulty, tags, accepted_count, submission_count
+       FROM problems WHERE id != ? AND (${likeClauses.join(' OR ')})
+       ORDER BY accepted_count DESC LIMIT 5`,
+      [id, ...tagParams]
+    );
+  }
+  if (similar.length === 0) {
+    similar = queryAll(
+      `SELECT id, title, type, difficulty, tags, accepted_count, submission_count
+       FROM problems WHERE id != ? AND difficulty = ?
+       ORDER BY accepted_count DESC LIMIT 5`,
+      [id, problem.difficulty]
+    );
+  }
+  res.json(similar);
+}
+
 module.exports = { listProblems, getProblem, createProblem, updateProblem, deleteProblem, getProblemStats, getAdminStats, getTagsCloud, exportProblems, importProblems, optimizeDatabase, getSimilarProblems, getRandomUnsolved };

backend/src/routes/problems.js

@@ -54,13 +54,6 @@ router.get('/random-unsolved', authenticate, getRandomUnsolved);
 router.get('/admin/stats', adminOnly, getAdminStats);
 router.get('/export', adminOnly, exportProblems);
 router.post('/import', adminOnly, importProblems);
-router.get('/:id', optionalAuth, getProblem);
-router.get('/:id/similar', optionalAuth, getSimilarProblems);
-router.post('/', adminOnly, createProblem);
-router.post('/admin/optimize', adminOnly, optimizeDatabase);
-router.put('/:id', adminOnly, updateProblem);
-router.delete('/:id', adminOnly, deleteProblem);
-
 router.get('/docs', (req, res) => {
   res.json({
     name: 'CodeJudge API',
@@ -94,5 +87,6 @@ router.get('/docs', (req, res) => {
     ],
   });
 });
+router.get('/:id', optionalAuth, getProblem);
 
 module.exports = router;

backend/src/services/judgeService.js

@@ -25,6 +25,25 @@ data = sys.stdin.read().strip().split('\\n')
 # 示例：读取第一行作为数组
 # nums = list(map(int, data[0].split()))
 # print(sum(nums))
+`,
+
+  cpp: `// 读取标准输入
+#include <iostream>
+#include <vector>
+#include <string>
+#include <sstream>
+using namespace std;
+
+int main() {
+    // 在这里处理数据
+    // 使用 cout 输出结果
+
+    // 示例：读取一行整数
+    // int n;
+    // cin >> n;
+    // cout << n << endl;
+    return 0;
+}
 `,
 };
 
@@ -113,6 +132,16 @@ function runCode(code, language, input) {
         cmd = `python "${filename}"`;
         break;
       }
+      case 'c':
+      case 'cpp':
+      case 'c++': {
+        filename = path.join(tmpDir, 'main.cpp');
+        fs.writeFileSync(filename, code);
+        const binary = path.join(tmpDir, 'main.exe');
+        execSync(`g++ "${filename}" -o "${binary}" -std=c++17 -O2`, { timeout: TIMEOUT_MS, windowsHide: true });
+        cmd = `"${binary}"`;
+        break;
+      }
       default:
         throw new Error(`不支持的语言: ${language}`);
     }

backend/src/utils/initDb.js

@@ -104,6 +104,20 @@ async function initDb() {
     }
   }
 
+  // Add default users if not exist
+  const adminExists = queryOne("SELECT id FROM users WHERE email = 'admin@oj.com'");
+  if (!adminExists) {
+    const hash = bcrypt.hashSync('admin123', 10);
+    run("INSERT OR IGNORE INTO users (username, email, password, role, last_login) VALUES (?, ?, ?, 'admin', ?)",
+      ['admin', 'admin@oj.com', hash, new Date().toISOString()]);
+  }
+  const testExists = queryOne("SELECT id FROM users WHERE email = 'test@oj.com'");
+  if (!testExists) {
+    const hash = bcrypt.hashSync('test123', 10);
+    run("INSERT OR IGNORE INTO users (username, email, password, role, last_login) VALUES (?, ?, ?, 'user', ?)",
+      ['test', 'test@oj.com', hash, new Date().toISOString()]);
+  }
+
   console.log('Database initialized successfully');
 }
 

frontend/src/components/CodeEditor.tsx

@@ -15,14 +15,14 @@ export default function CodeEditor({ code, language, onChange, readOnly = false
         <div className="flex-1 border-b border-dark-700" />
         <span className="flex items-center gap-1.5 px-3 py-1.5 text-xs text-dark-400">
           <Code2 className="w-3.5 h-3.5" />
-          {language === 'python' ? 'Python' : 'JavaScript'}
+          {language === 'python' ? 'Python' : language === 'cpp' ? 'C++' : 'JavaScript'}
         </span>
       </div>
 
       <div className="rounded-lg border border-dark-700 overflow-hidden">
         <Editor
           height="400px"
-          language={language === 'python' ? 'python' : 'javascript'}
+          language={language === 'python' ? 'python' : language === 'cpp' ? 'cpp' : 'javascript'}
           value={code}
           onChange={(value) => onChange(value || '')}
           theme="vs-dark"

frontend/src/pages/ProblemDetail.tsx

@@ -67,7 +67,7 @@ export default function ProblemDetail() {
 
   // Programming
   const [code, setCode] = useState('');
-  const [language, setLanguage] = useState<'javascript' | 'python'>('javascript');
+  const [language, setLanguage] = useState<'javascript' | 'python' | 'cpp'>('javascript');
 
   // Choice
   const [selectedAnswer, setSelectedAnswer] = useState<number | null>(null);
@@ -640,7 +640,7 @@ export default function ProblemDetail() {
             {problem.type === 'programming' && (
               <>
                 <div className="flex gap-2 mb-3">
-                  {(['javascript', 'python'] as const).map((lang) => (
+                  {(['javascript', 'python', 'cpp'] as const).map((lang) => (
                     <button
                       key={lang}
                       onClick={() => setLanguage(lang)}
@@ -650,7 +650,7 @@ export default function ProblemDetail() {
                           : 'bg-dark-800 text-gray-300 hover:bg-dark-700'
                       }`}
                     >
-                      {lang === 'javascript' ? 'JavaScript' : 'Python'}
+                      {lang === 'javascript' ? 'JavaScript' : lang === 'python' ? 'Python' : 'C++'}
                     </button>
                   ))}
                   <span className={`ml-auto text-[10px] self-center transition-opacity ${saved ? 'text-emerald-500/70' : 'text-yellow-500/70 opacity-0'}`}>
@@ -765,7 +765,7 @@ export default function ProblemDetail() {
 
                 <CodeEditor
                   code={code}
-                  language={language === 'javascript' ? 'javascript' : 'python'}
+                  language={language === 'javascript' ? 'javascript' : language === 'python' ? 'python' : 'cpp'}
                   onChange={setCode}
                 />
               </>

frontend/src/pages/Submissions.tsx

@@ -33,6 +33,7 @@ const LANGUAGE_FILTERS = [
   { label: '全部语言', value: '' },
   { label: 'JavaScript', value: 'javascript' },
   { label: 'Python', value: 'python' },
+  { label: 'C++', value: 'cpp' },
 ];
 
 const PAGE_SIZE = 15;