这是错误:
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/ios:39,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/ostream:40,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/iostream:40,
from date.h:15,
from date.cpp:13:
/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/bits/ios_base.h: In copy constructor ‘std::basic_ios<char, std::char_traits<char> >::basic_ios(const std::basic_ios<char, std::char_traits<char> >&)’:
/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/bits/ios_base.h:790: error: ‘std::ios_base::ios_base(const std::ios_base&)’ is private
/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/iosfwd:47: error: within this context
/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/iosfwd: In copy constructor ‘std::basic_ostream<char, std::char_traits<char> >::basic_ostream(const std::basic_ostream<char, std::char_traits<char> >&)’:
/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/iosfwd:56: note: synthesized method ‘std::basic_ios<char, std::char_traits<char> >::basic_ios(const std::basic_ios<char, std::char_traits<char> >&)’ first required here
date.cpp: In function ‘std::ostream operator<<(std::ostream&, Date&)’:
date.cpp:389: note: synthesized method ‘std::basic_ostream<char, std::char_traits<char> >::basic_ostream(const std::basic_ostream<char, std::char_traits<char> >&)’ first required here
make: *** [date.o] Error 1
我认为这可能与我的头文件和源文件如何编译在一起有关,所以这里是代码:
Header:
#ifndef DATE_H
#define DATE_H
#include <iostream>
using namespace std;
// basic but lengthy class code
#endif
Source:
// #include <iostream> // tried compiling with and without this, but no change
#include <cassert>
#include <cstdlib>
#include "date.h" // this is (date.cpp:13)
// I have tried using namespace std, just to see what would happen but nothing changed
最后,这是编译器引用的函数(date.cpp:389):
ostream operator <<(ostream &out, const Date &date)
{
// day
out << date.day;
switch (date.day)
{
case 1:
case 21:
case 31:
out << "st";
break;
case 2:
case 22:
out << "nd";
break;
case 3:
case 23:
out << "rd";
break;
default:
out << "th";
break;
}
// month
const char MONTHS[12][10] =
{ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"};
out << " of " << MONTHS[date.month - 1] << ", ";
// year
out << date.year;
return out;
}
我在这里完全困惑了。我在谷歌上搜索了过去一个小时,但找不到任何可以解决我的问题的东西。感谢您提前提供任何帮助!