c++中的csv文件管理(特别是设置标题和每个标题将分别具有的值)

#include <fstream>
#include <iostream>

int main() {
    std::ifstream file("data.csv");
    if (!file.is_open()) {
        std::cout << "Failed to open CSV file." << std::endl;
        return 1;
    }
    
    // 继续处理CSV文件...
    
    file.close();
    return 0;
}

#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>

int main() {
    std::ifstream file("data.csv");
    if (!file.is_open()) {
        std::cout << "Failed to open CSV file." << std::endl;
        return 1;
    }
    
    std::string line;
    std::getline(file, line); // 读取标题行
    
    std::vector<std::string> headers;
    std::istringstream iss(line);
    std::string header;
    while (std::getline(iss, header, ',')) { // 以逗号分隔解析标题
        headers.push_back(header);
    }
    
    // 输出标题
    for (const auto& h : headers) {
        std::cout << h << " ";
    }
    std::cout << std::endl;
    
    // 继续处理CSV文件...
    
    file.close();
    return 0;
}

#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>

int main() {
    std::ifstream file("data.csv");
    if (!file.is_open()) {
        std::cout << "Failed to open CSV file." << std::endl;
        return 1;
    }
    
    std::string line;
    std::getline(file, line); // 读取标题行
    
    std::vector<std::string> headers;
    std::istringstream iss(line);
    std::string header;
    while (std::getline(iss, header, ',')) { // 以逗号分隔解析标题
        headers.push_back(header);
    }
    
    // 存储每个标题对应的值
    std::map<std::string, std::vector<std::string>> data;
    while (std::getline(file, line)) { // 逐行读取数据行
        std::istringstream iss(line);
        std::string value;
        int i = 0;
        while (std::getline(iss, value, ',')) { // 以逗号分隔解析值
            data[headers[i]].push_back(value);
            i++;
        }
    }
    
    // 输出每个标题对应的值
    for (const auto& pair : data) {
        std::cout << pair.first << ": ";
        for (const auto& value : pair.second) {
            std::cout << value << " ";
        }
        std::cout << std::endl;
    }
    
    file.close();
    return 0;
}