C++生成报表的实现方式-乐工具技术知识

在C++中，生成报表通常需要将数据以表格或其他格式展示出来。这里有几种实现方式：

使用CSV文件

将数据存储在CSV（逗号分隔值）文件中，然后可以使用Microsoft Excel、LibreOffice Calc等电子表格软件打开和编辑这些文件。以下是一个简单的示例，展示如何将数据写入CSV文件：

#include
#include 
#include
#include

void write_csv(const std::string &filename, const std::vector> &data) {
    std::ofstream file(filename);
    if (!file.is_open()) {
        std::cerr << "Error opening file: "<< filename<< std::endl;
        return;
    }

    for (const auto &row : data) {
        for (size_t i = 0; i < row.size(); ++i) {
            file<< row[i];
            if (i < row.size() - 1) {
                file<< ",";
            }
        }
        file << "\n";
    }
}

int main() {
    std::vector> data = https://www.yisu.com/ask/{"Name", "Age", "City"},
        {"Alice", "30", "New York"},
        {"Bob", "25", "San Francisco"}
    };

    write_csv("report.csv", data);
    return 0;
}

使用HTML文件

将数据存储在HTML文件中，然后可以使用任何支持HTML的浏览器查看报表。以下是一个简单的示例，展示如何将数据写入HTML文件：

#include
#include 
#include
#include

void write_html(const std::string &filename, const std::vector> &data) {
    std::ofstream file(filename);
    if (!file.is_open()) {
        std::cerr << "Error opening file: "<< filename<< std::endl;
        return;
    }

    file << "\n";
    file << "\n";
    file << "\n";
    file << "Report\n";
    file<< "\n";
    file << "\n";
    file << "\n";

    for (const auto &row : data) {
        file << "\n";
        for (const auto &cell : row) {
            file << "\n";
        }
        file<< "\n";
    }

    file<< ""<< cell<< "\n";
    file<< "\n";
    file<< "\n";
}

int main() {
    std::vector> data = https://www.yisu.com/ask/{"Name", "Age", "City"},
        {"Alice", "30", "New York"},
        {"Bob", "25", "San Francisco"}
    };

    write_html("report.html", data);
    return 0;
}