std::ostream & operator＜＜

最新推荐文章于 2023-09-14 12:01:10 发布

原创最新推荐文章于 2023-09-14 12:01:10 发布 · 2.3k 阅读

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#c++

本文介绍了如何在C++中使用test类，包括构造函数处理API地址错误及友元函数实现对象输出。通过实例展示了如何创建test对象并使用cout进行输出。

#include <iostream>
#include <iostream>
#include <string>

class test{
public:
test(const std::string _domain,const std::string _interface,const std::string _instance);
private:

    std::string domain_;
    std::string interface_;
    std::string instance_;
   friend std::ostream &operator<<(std::ostream &_out, const test &_address);
};

test::test(const std::string _domain,const std::string _interface,const std::string _instance) {
    // TODO: handle error situation (_address is no valid CommonAPI address)
    domain_ = _domain;
    interface_ = _interface;
    instance_ = _instance;
}

std::ostream &
operator<<(std::ostream &_out, const test &_address) {
    _out << _address.domain_
          << ":" << _address.interface_
          << ":" << _address.instance_;
    return _out;
}

int main(){
    test t("a","b","c");
    std::cout<<t<<std::endl;
    return 0;
}

ygy@ygy-VirtualBox:~/work/tmp$ g++ b.cpp

ygy@ygy-VirtualBox:~/work/tmp$ ./a.out

a:b:c