0/4 In file included from problem2/problem2.cpp:1:0: problem2/main.h: In function ‘std::__cxx11::string reverseWords(std::__cxx11::string)’: problem2/main.h:8:4: error: ‘vector’ was not declared in this scope vector words; ^~~~~~ problem2/main.h:8:4: note: suggested alternative: ‘perror’ vector words; ^~~~~~ perror problem2/main.h:8:17: error: expected primary-expression before ‘>’ token vector words; ^ problem2/main.h:8:19: error: ‘words’ was not declared in this scope vector words; ^~~~~ probl
从你给出的报错信息可知,代码里存在以下几个问题: 1. `vector` 未声明,需要包含 `<vector>` 头文件,并且使用 `std` 命名空间。 2. `vector` 声明时未指定元素类型,应当明确元素类型。 3. `stringstream` 未声明,需要包含 `<sstream>` 头文件,并且使用 `std` 命名空间。 下面是修改后的示例代码: ```cpp // main.h #include <vector> #include <sstream> #include <string> // 假设 reverseWords 函数定义如下 std::string reverseWords(std::string s) { // 声明一个存储字符串的向量 std::vector<std::string> words; // 使用 stringstream 分割字符串 std::stringstream ss(s); std::string word; // 按空格分割字符串并存储到向量中 while (ss >> word) { words.push_back(word); } std::string result; // 反向拼接单词 for (auto it = words.rbegin(); it != words.rend(); ++it) { if (!result.empty()) { result += " "; } result += *it; } return result; } ``` ```cpp // problem2.cpp #include "main.h" #include <iostream> int main() { std::string s = "hello world"; std::string reversed = reverseWords(s); std::cout << reversed << std::endl; return 0; } ``` 代码说明: 1. 在 `main.h` 中包含了 `<vector>`、`<sstream>` 和 `<string>` 头文件,以使用 `std::vector`、`std::stringstream` 和 `std::string`。 2. `reverseWords` 函数将输入的字符串按空格分割成单词,存储在 `std::vector<std::string>` 中,然后反向拼接这些单词并返回结果。 3. `problem2.cpp` 中包含了 `main.h` 头文件,并调用 `reverseWords` 函数进行测试。 [2025-11-12 14:49:29 | AI问答 | 489点数解答]
- [字节豆包] 0/4 In file included from problem2/problem2.cpp:1:0: problem2/main.h: In function ‘std::__cxx11::string reverseWords(std::__cxx11::string)’: problem2/main.h:8:4: error: ‘vector’ was not declared in this scope vector words; ^~~~~~ problem2/main.h:8:4: note: suggested alternative: ‘perror’ vector words; ^~~~~~ perror problem2/main.h:8:17: error: expected primary-expression before ‘>’ token vector words; ^ problem2/main.h:8:19: error: ‘words’ was not declared in this scope vector words; ^~~~~ probl(489点数解答 | 2025-11-12 14:49:29)13
- [GPT] 运行不了,修改以下代码写出完整代码#include <windows.h> #include <vector> #include <ctime> #include <cstdlib> const int grid_size = 100; // 每个格子的大小 const int box_count = 3; // 箱子数量 const int target_count = 3; // 目标点数量 const int obstacle_count = 5; // 障碍物数量 struct point { int x, y; }; hbitmap hboxbitmap; // 箱子图片的位图句柄 hbrush htargetbrush; // 目标点的画刷 hbrush hobstaclebrush; // 障碍物的画刷 std::vector<point> boxes; // 箱子的位置 std::vector<point> targets; // 目标点的位置 std::vector<point> o(2686点数解答 | 2024-10-31 15:01:39)304
- [DeepSeek] #include <stdio.h> #include <stdlib.h> // 函数声明 void findSubsets(int *set, int subset[], int index, int n, FILE *outputFile); int main() { int n; // 从文件中读取集合的大小 FILE *inputFile = fopen("input.txt", "r"); if (inputFile == NULL) { perror("无法打开输入文件"); return 1; } fscanf(inputFile, "%d", &n); fclose(inputFile); // 再次打开文件以读取集合元素 inputFile = fopen("input.txt", "r"); if (inputFile == NULL) { perror("无法重新打开输入文件"); return 1; } (856点数解答 | 2025-04-02 08:35:29)114
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- [字节豆包] consoleapplication40.cpp 1>c:\users\lenovo\documents\visual studio 2013\projects\consoleapplication40\consoleapplication40\consoleapplication40.cpp(66): error c2783: “bintreenode<t> *buildtree(const std::string &,int &)”: 未能为“t”推导 模板 参数 1> c:\users\lenovo\documents\visual studio 2013\projects\consoleapplication40\consoleapplication40\consoleapplication40.cpp(43) : 参见“buildtree”的声明(138点数解答 | 2024-11-10 23:42:06)207
- [字节豆包] 基于这段代码为您进行补充完善 package com.example.news.models class user( val username: string, val email: string, val gender: string ) { // 如果需要默认构造函数,可以添加 constructor() : this("", "", "") }和package com.example.news.models import java.io.serializable class news( val title: string, val content: string, val publisher: string, val publishtime: string = java.util.date().tostring() ) : serializable { }和package com.example.news.models data class comment( val content: string, val commenter: string, var date:string,(215点数解答 | 2024-12-13 19:41:46)265
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- [讯飞星火] #include <iostream> #include<cstring> using namespace std; class vehicle{ public: void run(); string getname(); vehicle(string name); string name; }; vehicle::vehicle(string name){ this->name = name; } void vehicle::run(){ cout<<"出发"<<endl; } string vehicle::getname(){ return name; } class car:public vehicle{ public: void break(); void display(); car(int seats,string color,string type,int power,string name); en(65点数解答 | 2024-05-26 17:01:16)298
- [GPT] #include <iostream> #include<cstring> using namespace std; class vehicle{ public: void run(); string getname(); vehicle(string name); string name; }; vehicle::vehicle(string name){ this->name = name; } void vehicle::run(){ cout<<"出发"<<endl; } string vehicle::getname(){ return name; } class car:public vehicle{ public: void break(); void display(); car(int seats,string color,string type,int power,string name); en(373点数解答 | 2024-05-26 17:02:18)286
- [阿里通义] router.get('/orders', async (req, res) => { try { const token = req.headers.authorization?.split(' ')[1]; if (!token) { return res.status(401).json({ success: false, message: '未提供令牌' }); } const decoded = jwt.verify(token, secretkey); const maintenanceid = decoded.id; if (!maintenanceid) { return res.status(401).json({ success: false, message: '令牌无效' }); } const orders = await repairorder.findall({ where: { maintenanceid } })(317点数解答 | 2024-11-25 18:21:15)216