C++对象序列化方法 二进制流读写实现

#include 
#include 

struct Point {
    int x;
    int y;
};

void saveBinary(const Point& p, const std::string& filename) {
    std::ofstream out(filename, std::ios::binary);
    out.write(reinterpret_cast(&p), sizeof(p));
    out.close();
}

void loadBinary(Point& p, const std::string& filename) {
    std::ifstream in(filename, std::ios::binary);
    in.read(reinterpret_cast(&p), sizeof(p));
    in.close();
}

struct Person {
    std::string name;
    int age;
    std::vector scores;

    void save(std::ofstream& out) const {
        // 写字符串
        size_t len = name.size();
        out.write(reinterpret_cast(&len), sizeof(len));
        out.write(name.data(), len);

        // 写基本类型
        out.write(reinterpret_cast(&age), sizeof(age));

        // 写vector
        size_t count = scores.size();
        out.write(reinterpret_cast(&count), sizeof(count));
        for (double v : scores) {
            out.write(reinterpret_cast(&v), sizeof(v));
        }
    }

    void load(std::ifstream& in) {
        // 读字符串
        size_t len;
        in.read(reinterpret_cast(&len), sizeof(len));
        name.resize(len);
        in.read(&name[0], len);

        // 读基本类型
        in.read(reinterpret_cast(&age), sizeof(age));

        // 读vector
        size_t count;
        in.read(reinterpret_cast(&count), sizeof(count));
        scores.resize(count);
        for (double& v : scores) {
            in.read(reinterpret_cast(&v), sizeof(v));
        }
    }
};