C++ 如何修复重载操作数+；？

我有过载Operator+的问题

这是我的密码：

class Odcinek : public Figura
{
public:
    Odcinek(int ile,string imie,char znak): Figura(ile,imie,znak){}
    friend Odcinek& operator+(int liczba);
    virtual void wypisz() const;
};

Odcinek& operator+(int liczba);
{
    Odcinek Od;
    Od.ile = Od.ile+liczba;
    Od.imie = imie;
    Od.znak = znak;
    return Od;
}

我想让它起作用：

Odcinek F3(5,"Odcinek drugi",'*');

F3+3;

||==构建：图中的调试（编译器：GNU GCC编译器）===| include\Figura.h | 29 | error:'Odcinek&operator+（int）'必须具有类或枚举类型的参数| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp |在函数“int main（）”中：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |错误：与“运算符+”不匹配（操作数类型为“Odcinek”和“int”）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl\u iterator.h | 341 |注：候选：模板std:：reverse\u iterator std:：operator+（typename std:：reverse\u iterator:：difference\u type，const std:：reverse\u iterator&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl_iterator.h | 341 |注意：模板参数推导/替换失败：| include\Figura.h | 29 | error:'Odcinek&operator+（int）'必须具有类或枚举类型的参数| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\src\Figura.cpp | 67 |错误：“Odcinek&operator+（int）”必须具有类或枚举类型的参数| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\src\Figura.cpp | 68 |错误：在“{”标记之前应为非限定id| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：类型“const std:：reverse_iterator”和“int”不匹配| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl\u iterator.h | 1200 |注：候选：模板std:：move\u iterator std:：operator+（typename std:：move\u iterator:：difference\u type，const std:：move\u iterator&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl|u迭代器.h | 1200 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：类型“const std:：move_iterator”和“int”不匹配| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4929 |注：候选：模板标准：：_cxx11:：basic_string标准：：operator+（常量标准：_uCXX11:：basic_string&，常量标准：：_uCXX11:：basic_string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4929 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：“Odcinek”不是从“const std:：uu cxx11:：basic|string”派生而来的| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic\u string.tcc | 1147 |注：候选：模板std:：uuucx11:：basic\u string std:：operator+（常量图表*，常量std:uuuucx11:：basic\u string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.tcc | 1147 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注：类型“const | u CharT*”和“Odcinek”不匹配| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic\u string.tcc | 1163 |注：候选：模板std:：uucx11:：basic\u string std:：operator+（CharT，const std:uuuucx11:：basic\u string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.tcc | 1163 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：不匹配的类型“const std:：uuCXX11:：basic_string”和“int”| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4966 |注：候选：模板标准：：_cxx11:：basic_string标准：：运算符+（常量标准：_cxx11:：basic_string&，常量图表*）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4966 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：“Odcinek”不是从“const std:：uu cxx11:：basic|string”派生而来的| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4982 |注：候选：模板std:：u cx11:：basic_string std:：operator+（常量std:u cx11:：basic_string&，CharT）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4982 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：“Odcinek”不是从“const std:：uu cxx11:：basic|string”派生而来的| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic\u string.h | 4994 |注：候选：模板std:：u cx11:：basic\u string std:：operator+（std:u cx11:：basic\u string&，const std:u cx11:：basic\u string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 4994 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：“Odcinek”不是从“std:：uu cxx11:：basic_string”派生而来的| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 5000 |注：候选：模板std:：u cx11:：basic_string std:：operator+（常量std:u cx11:：basic_string&，std:u cx11:：basic_string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 5000 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：“Odcinek”不是从“const std:：uu cxx11:：basic|string”派生而来的| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic\u string.h | 5006 |注：候选：模板std:：(uu cx11:：basic(uu string std:：operator+)（std:(uu cx11:：basic)uu string&，std:(uu cx11:：basic)uu string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 5006 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe~kolokwium\Figura\main.cpp | 15 |注意：“Odcinek”不是从“std:：uu cxx11:：basic_string”派生而来的| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic\u string.h | 5018 |注：候选：模板std:：uucx11:：basic\u string std:：operator+（const\u CharT*，std:uuuucx11:：basic\u string&）| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h | 5018 |注意：模板参数推导/替换失败：| C:\Users\mkkar\Desktop\Programowanie obiektowe ||=== Build: Debug in Figura (compiler: GNU GCC Compiler) ===| include\Figura.h|29|error: 'Odcinek& operator+(int)' must have an argument of class or enumerated type| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp||In function 'int main()':| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|error: no match for 'operator+' (operand types are 'Odcinek' and 'int')| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl_iterator.h|341|note: candidate: template std::reverse_iterator std::operator+(typename std::reverse_iterator::difference_type, const std::reverse_iterator&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl_iterator.h|341|note: template argument deduction/substitution failed:| include\Figura.h|29|error: 'Odcinek& operator+(int)' must have an argument of class or enumerated type| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\src\Figura.cpp|67|error: 'Odcinek& operator+(int)' must have an argument of class or enumerated type| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\src\Figura.cpp|68|error: expected unqualified-id before '{' token| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: mismatched types 'const std::reverse_iterator' and 'int'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl_iterator.h|1200|note: candidate: template std::move_iterator std::operator+(typename std::move_iterator::difference_type, const std::move_iterator&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\stl_iterator.h|1200|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: mismatched types 'const std::move_iterator' and 'int'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4929|note: candidate: template std::__cxx11::basic_string std::operator+(const std::__cxx11::basic_string&, const std::__cxx11::basic_string&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4929|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'const std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.tcc|1147|note: candidate: template std::__cxx11::basic_string std::operator+(const _CharT*, const std::__cxx11::basic_string&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.tcc|1147|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: mismatched types 'const _CharT*' and 'Odcinek'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.tcc|1163|note: candidate: template std::__cxx11::basic_string std::operator+(_CharT, const std::__cxx11::basic_string&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.tcc|1163|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: mismatched types 'const std::__cxx11::basic_string' and 'int'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4966|note: candidate: template std::__cxx11::basic_string std::operator+(const std::__cxx11::basic_string&, const _CharT*)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4966|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'const std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4982|note: candidate: template std::__cxx11::basic_string std::operator+(const std::__cxx11::basic_string&, _CharT)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4982|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'const std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4994|note: candidate: template std::__cxx11::basic_string std::operator+(std::__cxx11::basic_string&&, const std::__cxx11::basic_string&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|4994|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5000|note: candidate: template std::__cxx11::basic_string std::operator+(const std::__cxx11::basic_string&, std::__cxx11::basic_string&&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5000|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'const std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5006|note: candidate: template std::__cxx11::basic_string std::operator+(std::__cxx11::basic_string&&, std::__cxx11::basic_string&&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5006|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5018|note: candidate: template std::__cxx11::basic_string std::operator+(const _CharT*, std::__cxx11::basic_string&&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5018|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: mismatched types 'const _CharT*' and 'Odcinek'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5024|note: candidate: template std::__cxx11::basic_string std::operator+(_CharT, std::__cxx11::basic_string&&)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5024|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: mismatched types 'std::__cxx11::basic_string' and 'int'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5030|note: candidate: template std::__cxx11::basic_string std::operator+(std::__cxx11::basic_string&&, const _CharT*)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5030|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'std::__cxx11::basic_string'| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5036|note: candidate: template std::__cxx11::basic_string std::operator+(std::__cxx11::basic_string&&, _CharT)| c:\mingw\lib\gcc\mingw32\6.3.0\include\c++\bits\basic_string.h|5036|note: template argument deduction/substitution failed:| C:\Users\mkkar\Desktop\Programowanie obiektowe ~kolokwium\Figura\main.cpp|15|note: 'Odcinek' is not derived from 'std::__cxx11::basic_string'| ||=== Build failed: 5 error(s), 0 warning(s) (0 minute(s), 1 second(s)) ===|

Odcinek& operator+(int liczba);
                              ^

    Odcinek Od;
    Od.ile = Od.ile+liczba;

    Odcinek Od;
    Od.ile = ile+liczba;

Odcinek& operator+(int liczba)
{
    Odcinek Od; // Od created here
    Od.ile = ile+liczba;
    Od.imie = imie;
    Od.znak = znak;
    return Od;
} // Od destroyed here

class Odcinek : public Figura
{
public:
    Odcinek(int ile,string imie,char znak): Figura(ile,imie,znak){}
    Odcinek operator+(int liczba) const;
    virtual void wypisz() const;
};

Odcinek Odcinek::operator+(int liczba) const
{
    Odcinek Od;
    Od.ile = ile+liczba;
    Od.imie = imie;
    Od.znak = znak;
    return Od;
}