C++,错误:"无操作符"=="匹配这些操作数",ostream/istream

Question

我是一个新的编码,需要为某种数据库做一个程序.我看到一些关于youtube的教程,复制了他的代码,但是我得到了一个错误,我不知道如何解决它.

错误:没有运算符"=="匹配这些操作数; 参考if(out == cout)

这是代码:

void Employee::output(ostream& outs)
{
    if (outs == cout)
    {
        outs << "Name: " << name << endl;
        outs << "ID number: " << id_number << endl;
        outs << "Address: " << address << endl;
        outs << "Salary: " << salary << endl;
        outs << "Years worked at company: " << year_started << endl;
    }
    else {
        outs << name << endl;
        outs << id_number << endl;
        outs << address << endl;
        outs << salary << endl;
        outs << year_started << endl;
    }
}

这是我如何声明输出:

void output(std::ostream& outs);

使用#include <>添加了iostream和字符串

Answer 1

Stream对象无法比较,但您可以比较它们的地址:

    if ( & outs == & cout )