camke(12) 配置yaml-cpp 读取和保存数据

编译库位置

ros环境的yaml会干扰正常环境，CMakeLists要修改下手动指定build文件夹下编译的库

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)
project(YamlCppExample)

# 设置C++标准
set(CMAKE_CXX_STANDARD 11)

# 查找yaml-cpp包 - ros 环境被干扰使用错误，报错段错误或者找不到
#find_package(yaml-cpp REQUIRED)

# 添加可执行文件
add_executable(node main.cpp)

# 链接yaml-cpp库  - ros 环境被干扰使用错误，报错段错误或者找不到
#target_link_libraries(node yaml-cpp)

# 如果yaml-cpp没有自动发现，防止被ros环境干扰,手动找到编译的库位置：
set(YAML_CPP_LIBRARIES "/home/dongdong/1sorftware/1work/openvslam/yaml-cpp-0.6.3/BUILD/libyaml-cpp.a")
target_link_libraries(node ${YAML_CPP_LIBRARIES})

main.cpp

#include <iostream>
#include <yaml-cpp/yaml.h>
#include <fstream>

using namespace std;

int save_yaml(std::string sava_path) {
    // 创建一个YAML文档
    YAML::Emitter emitter;

    // 开始写入YAML文档
    emitter << YAML::BeginMap;

    emitter << YAML::Key << "name";
    emitter << YAML::Value << "Alice";

    emitter << YAML::Key << "age";
    emitter << YAML::Value << 25;

    emitter << YAML::Key << "city";
    emitter << YAML::Value << "London";

    // 结束写入YAML文档
    emitter << YAML::EndMap;

    // 将YAML数据写入文件
    std::ofstream fout(sava_path);
    fout << emitter.c_str();
    fout.close();

    std::cout << "YAML data saved to output.yaml" << std::endl;

    return 0;
}


int read_yaml(std::string read_path) {
    try {
        // 读取YAML文件
        YAML::Node config = YAML::LoadFile(read_path);

        // 访问YAML中的数据
        std::string name = config["name"].as<std::string>();
        int age = config["age"].as<int>();
        std::string city = config["city"].as<std::string>();

        // 打印读取的数据
        std::cout << "Name: " << name << std::endl;
        std::cout << "Age: " << age << std::endl;
        std::cout << "City: " << city << std::endl;

    } catch (const YAML::Exception& e) {
        std::cerr << "YAML Exception: " << e.what() << std::endl;
        return 1;
    }

    return 0;
}


int main() {

string config_path ="../config.yaml";
read_yaml(config_path);

string sava_path ="../out.yaml";
save_yaml(sava_path) ;


}