feat: 添加实现四舍五入的C++算法

Co-authored-by: Copilot <copilot@github.com>

Author: tkzzzzzz6

niuke/problems/新手入门130/noob97.参议院投票.cpp

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+/*
+ * @Author: tkzzzzzz6
+ * @Date: 2026-04-28 22:44:10
+ * @LastEditors: tkzzzzzz6
+ * @LastEditTime: 2026-04-28 22:44:16
+ */
+/**
+ * @nc app=nowcoder id=f334a81b22654efc8d7a67e31f60de50 topic=383 question=11211642 lang=C++
+ * 2026-04-28 22:44:10
+ * https://www.nowcoder.com/practice/f334a81b22654efc8d7a67e31f60de50?tpId=383&tqId=11211642
+ * [noob97] 参议院投票
+ */
+
+/** @nc code=start */
+
+class Solution {
+public:
+    /**
+     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
+     *
+     * 求出最终获胜帮派的名称
+     * @param s string字符串 
+     * @return string字符串
+     */
+    string predictVictory(string s) {
+        // write code here
+        
+    }
+};
+
+/** @nc code=end */

niuke/problems/编程入门-C/CPP11.判断季节.cpp

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+/**
+ * @nc app=nowcoder id=741a9b79fabe474cb153a49b4bff5828 topic=225 question=2180560 lang=C++
+ * 2026-05-04 16:28:11
+ * https://www.nowcoder.com/practice/741a9b79fabe474cb153a49b4bff5828?tpId=225&tqId=2180560
+ * [CPP11] 判断季节
+ */
+
+/** @nc code=start */
+
+#include <iostream>
+using namespace std;
+
+int main() {
+    
+    int month;
+    cin >> month;
+
+    // write your code here......
+    switch(month){
+        case 3:case 4:case 5:
+            cout << "春季" << endl;
+            break;
+        case 6:case 7:case 8:
+            cout << "夏季" << endl;
+            break;
+        case 9:case 10:case 11:
+            cout << "秋季" << endl;
+            break;
+        case 12:case 1:case 2:
+            cout << "冬季" << endl;
+            break;
+        default:
+            cout << "不合法" << endl;
+            break;
+    }
+
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C/CPP3.两数求和.cpp

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+/**
+ * @nc app=nowcoder id=f1b704af4f654be285552bea53ce6534 topic=225 question=2179352 lang=C++
+ * 2026-05-04 16:24:21
+ * https://www.nowcoder.com/practice/f1b704af4f654be285552bea53ce6534?tpId=225&tqId=2179352
+ * [CPP3] 两数求和
+ */
+
+/** @nc code=start */
+
+#include <iostream>
+using namespace std;
+
+int main() {
+
+    // write your code here......
+    int a,b;
+    cin >> a >> b;
+    cout << a + b <<endl;
+
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C/CPP4.获取两数中的较大值.cpp

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+/**
+ * @nc app=nowcoder id=136bd5e1021d4d698b9f5227d7dfb684 topic=225 question=2179405 lang=C++
+ * 2026-05-04 16:24:53
+ * https://www.nowcoder.com/practice/136bd5e1021d4d698b9f5227d7dfb684?tpId=225&tqId=2179405
+ * [CPP4] 获取两数中的较大值
+ */
+
+/** @nc code=start */
+
+#include <iostream>
+using namespace std;
+
+int main() {
+
+    // write your code here......
+    
+
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C/CPP7.获取三个数中的最大值（三元表达式实现）.cpp

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+/**
+ * @nc app=nowcoder id=d7d48b7b44df46889137ec19d924bb14 topic=225 question=2180072 lang=C++
+ * 2026-05-04 16:25:05
+ * https://www.nowcoder.com/practice/d7d48b7b44df46889137ec19d924bb14?tpId=225&tqId=2180072
+ * [CPP7] 获取三个数中的最大值（三元表达式实现）
+ */
+
+/** @nc code=start */
+
+#include <iostream>
+using namespace std;
+
+int main() {
+    
+    int a, b, c;
+    cin >> a;
+    cin >> b;
+    cin >> c;
+
+    // write your code here......
+    cout << ((a > b) ? ((a > c) ? a : c) : ((b>c)?b:c));
+
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C语言/CC1.获取字符串长度.cpp

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+/*
+ * @Author: tkzzzzzz6
+ * @Date: 2026-05-04 16:37:40
+ * @LastEditors: tkzzzzzz6
+ * @LastEditTime: 2026-05-06 22:36:29
+ */
+/**
+ * @nc app=nowcoder id=9a2d212d23f5436c80607d5e68c6d12a topic=291 question=2185204 lang=C++
+ * 2026-05-04 16:37:40
+ * https://www.nowcoder.com/practice/9a2d212d23f5436c80607d5e68c6d12a?tpId=291&tqId=2185204
+ * [CC1] 获取字符串长度
+ */
+
+/** @nc code=start */
+
+
+#include <stdio.h>
+
+int main() {
+
+    char buf[100] = {};
+    if(fgets(buf,sizeof(buf),stdin) == nullptr)return 0;
+
+    char* p = buf;
+    int len = 0;
+    while (*p != '\0' && *p != '\n') {
+        len++;
+        p++;
+    }
+
+    printf("%d", len);
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C语言/CC2.复制部分字符串.c

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+/**
+ * @nc app=nowcoder id=8f5b923683b94e549880e3c8370e3e55 topic=291 question=2185436 lang=C
+ * 2026-05-06 22:48:30
+ * https://www.nowcoder.com/practice/8f5b923683b94e549880e3c8370e3e55?tpId=291&tqId=2185436
+ * [CC2] 复制部分字符串
+ */
+
+/** @nc code=start */
+
+#include <stdio.h>
+#include <string.h>
+
+int main() {
+
+    string str1 
+    
+
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C语言/CC2.复制部分字符串.cpp

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+/**
+ * @nc app=nowcoder id=8f5b923683b94e549880e3c8370e3e55 topic=291 question=2185436 lang=C++
+ * 2026-05-06 22:43:49
+ * https://www.nowcoder.com/practice/8f5b923683b94e549880e3c8370e3e55?tpId=291&tqId=2185436
+ * [CC2] 复制部分字符串
+ */
+
+/** @nc code=start */
+
+#include <iostream>
+using namespace std;
+
+int main() {
+
+    char str[30] = { 0 };
+    cin.getline(str, sizeof(str));
+
+    int m;
+    cin >> m;
+
+    // write your code here......
+    
+
+    return 0;
+}
+
+/** @nc code=end */

niuke/problems/编程入门-C语言/c语言相关知识点总结.md

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+# 指针
+
+