开始学习c ++中的课程，我遇到了一个简单的棋盘游戏...但是我得到了这个疯狂的错误，我无法解决。
如果我不在这里发布这类问题，请告诉我。
Board.h：
#include<vector>
using namespace std;
class Board{
int largura;
int altura;
public:
Board(int x,int y) : largura(x), altura(y) {}
vector<vector<int> > mat();
void printa();
};
Board.cpp：
#include "Board.h"
#include <vector>
#include <iostream>
using namespace std;
vector<vector<int> > Board::mat() {
vector<vector<int> > v(altura, vector<int>(largura,1));
return v;
}
void Board::printa() {
auto matriz = mat();
vector<int> vec(largura,0);
for(;;) {
for (auto i:vec) {
for (auto j:vec) {
cout << matriz[i,j];
}
cout << "\n";
}
}
}
main.cpp中：
#include<iostream>
#include "Board.h"
#include <vector>
using namespace std;
int main(){
Board tela(5, 5);
tela.mat();
tela.printa();
return 0;
}
错误：
[Rafael@localhost untitled]$ g++ -std=c++17 main.cpp Board.cpp -o board
Board.cpp: In member function ‘void Board::printa()’:
Board.cpp:22:22: error: no match for ‘operator<<’ (operand types are ‘std::ostream {aka std::basic_ostream<char>}’ and ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’)
cout << matriz[i,j];
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:108:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(__ostream_type& (*__pf)(__ostream_type&))
^~~~~~~~
/usr/include/c++/6.3.1/ostream:108:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘std::basic_ostream<char>::__ostream_type& (*)(std::basic_ostream<char>::__ostream_type&) {aka std::basic_ostream<char>& (*)(std::basic_ostream<char>&)}’
/usr/include/c++/6.3.1/ostream:117:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type& (*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]
operator<<(__ios_type& (*__pf)(__ios_type&))
^~~~~~~~
/usr/include/c++/6.3.1/ostream:117:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘std::basic_ostream<char>::__ios_type& (*)(std::basic_ostream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}’
/usr/include/c++/6.3.1/ostream:127:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(ios_base& (*__pf) (ios_base&))
^~~~~~~~
/usr/include/c++/6.3.1/ostream:127:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘std::ios_base& (*)(std::ios_base&)’
/usr/include/c++/6.3.1/ostream:166:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(long __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:166:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘long int’
/usr/include/c++/6.3.1/ostream:170:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(unsigned long __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:170:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘long unsigned int’
/usr/include/c++/6.3.1/ostream:174:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(bool __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:174:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘bool’
In file included from /usr/include/c++/6.3.1/ostream:638:0,
from /usr/include/c++/6.3.1/iostream:39,
from Board.cpp:7:
/usr/include/c++/6.3.1/bits/ostream.tcc:91:5: note: candidate: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits<char>]
basic_ostream<_CharT, _Traits>::
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/6.3.1/bits/ostream.tcc:91:5: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘short int’
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:181:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(unsigned short __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:181:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘short unsigned int’
In file included from /usr/include/c++/6.3.1/ostream:638:0,
from /usr/include/c++/6.3.1/iostream:39,
from Board.cpp:7:
/usr/include/c++/6.3.1/bits/ostream.tcc:105:5: note: candidate: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits<char>]
basic_ostream<_CharT, _Traits>::
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/6.3.1/bits/ostream.tcc:105:5: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘int’
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:192:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(unsigned int __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:192:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘unsigned int’
/usr/include/c++/6.3.1/ostream:201:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(long long __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:201:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘long long int’
/usr/include/c++/6.3.1/ostream:205:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(unsigned long long __n)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:205:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘long long unsigned int’
/usr/include/c++/6.3.1/ostream:220:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(double __f)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:220:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘double’
/usr/include/c++/6.3.1/ostream:224:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(float __f)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:224:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘float’
/usr/include/c++/6.3.1/ostream:232:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(long double __f)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:232:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘long double’
/usr/include/c++/6.3.1/ostream:245:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(const void*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
operator<<(const void* __p)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:245:7: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘const void*’
In file included from /usr/include/c++/6.3.1/ostream:638:0,
from /usr/include/c++/6.3.1/iostream:39,
from Board.cpp:7:
/usr/include/c++/6.3.1/bits/ostream.tcc:119:5: note: candidate: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]
basic_ostream<_CharT, _Traits>::
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/6.3.1/bits/ostream.tcc:119:5: note: no known conversion for argument 1 from ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ to ‘std::basic_ostream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}’
In file included from /usr/include/c++/6.3.1/string:52:0,
from /usr/include/c++/6.3.1/bits/locale_classes.h:40,
from /usr/include/c++/6.3.1/bits/ios_base.h:41,
from /usr/include/c++/6.3.1/ios:42,
from /usr/include/c++/6.3.1/ostream:38,
from /usr/include/c++/6.3.1/iostream:39,
from Board.cpp:7:
/usr/include/c++/6.3.1/bits/basic_string.h:5325:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator<<(basic_ostream<_CharT, _Traits>& __os,
^~~~~~~~
/usr/include/c++/6.3.1/bits/basic_string.h:5325:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’ is not derived from ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/bits/ios_base.h:46:0,
from /usr/include/c++/6.3.1/ios:42,
from /usr/include/c++/6.3.1/ostream:38,
from /usr/include/c++/6.3.1/iostream:39,
from Board.cpp:7:
/usr/include/c++/6.3.1/system_error:209:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
^~~~~~~~
/usr/include/c++/6.3.1/system_error:209:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘const std::error_code&’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:497:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:497:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: deduced conflicting types for parameter ‘_CharT’ (‘char’ and ‘std::vector<int>’)
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:502:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:502:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘char’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:508:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)
operator<<(basic_ostream<char, _Traits>& __out, char __c)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:508:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘char’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:514:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)
operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:514:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘signed char’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:519:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)
operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:519:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘unsigned char’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:539:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:539:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: mismatched types ‘const _CharT*’ and ‘std::vector<int>’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/ostream:638:0,
from /usr/include/c++/6.3.1/iostream:39,
from Board.cpp:7:
/usr/include/c++/6.3.1/bits/ostream.tcc:321:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
^~~~~~~~
/usr/include/c++/6.3.1/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘const char*’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:556:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)
operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:556:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘const char*’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:569:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)
operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:569:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘const signed char*’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:574:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)
operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:574:5: note: template argument deduction/substitution failed:
Board.cpp:22:35: note: cannot convert ‘matriz.std::vector<_Tp, _Alloc>::operator[]<std::vector<int>, std::allocator<std::vector<int> > >(((void)0, ((std::vector<std::vector<int> >::size_type)j)))’ (type ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> > >::value_type {aka std::vector<int>}’) to type ‘const unsigned char*’
cout << matriz[i,j];
^
In file included from /usr/include/c++/6.3.1/iostream:39:0,
from Board.cpp:7:
/usr/include/c++/6.3.1/ostream:628:5: note: candidate: std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = std::vector<int>] <near match>
operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
^~~~~~~~
/usr/include/c++/6.3.1/ostream:628:5: note: conversion of argument 1 would be ill-formed:
Board.cpp:22:35: error: cannot bind ‘std::ostream {aka std::basic_ostream<char>}’ lvalue to ‘std::basic_ostream<char>&&’
cout << matriz[i,j];
答案 0 :(得分：2)
[i,j]是一个陷阱。它与[j]是一回事。你想要的是matriz[i][j];，而不是matriz[i,j]。
（你还应该避免头文件中的using指令，但这纯粹是装饰性的。你的问题是[i,j]部分。）