(++)error in g

[משה ברטל‎]

שלום מתן,
התכנית עובדת לי באופן מלא ב ויז'ואל וחלקית ב g++ עד שאני מנסה לקמפל עם
השורה הזו במיין
cout<<mat1+mat2;
זו ההודעה

main.cpp: In function âint main()â:
main.cpp:16: error: no match for âoperator<<â in âstd::cout <<
Matrix<T>::operator+(Matrix<T>) [with T = int](matii)â
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:67: note: candidates are: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(std::basic_ostream<_CharT, _Traits>& (*)
(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = char, _Traits =
std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:78: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(std::basic_ios<_CharT, _Traits>& (*)
(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits =
std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:90: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT
= char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:241: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long int)
[with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:264: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long
unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:102: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with
_CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:125: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int)
[with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:157: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short
unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:183: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with
_CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:215: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned
int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:288: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long long
int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:311: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long long
unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:361: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(double)
[with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:335: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with
_CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:384: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long double)
[with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:407: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(const void*)
[with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/
bits/ostream.tcc:430: note: std::basic_ostream<_CharT,
_Traits>& std::basic_ostream<_CharT,
_Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*) [with
_CharT = char, _Traits = std::char_traits<char>]
Matrix.h:168: note: std::basic_ostream<char,
std::char_traits<char> >& operator<<(std::basic_ostream<char,
std::char_traits<char> >&, Matrix<int>&)
make: *** [main.o] Error 1


הדפסה של המטריצה הזמנית החדשה עובדת אם אני מדפיס מתוך אופרטור + (לפני
שליחה מתוך אופרטור החיבור לאופרטור הדפסה ב main.

האם יש מוצא?

תודה, משה

[Matan Keidar]

שלום משה,

בלי הקוד קצת קשה לעזור.

בכל מקרה, לפי השגיאות אני רואה שהבעיה היא בהגדרה של אופרטור הפלט. 

הסתכל בדוגמאות שראינו במצגות. עשינו דוגמא ל-template function וגם template class.

בכל מקרה, אין להדפיס מאופרטור + אלא רק מאופרטור ההדפסה.

מתן

2012/2/1 משה ברטל <mosh...@gmail.com>