c++ - Could not convert from <brace-enclosed initializer list> to int(*) array -

i new c++, , error keep getting.

#include <iostream> #include <string>  using namespace std;  void print (int test[2][2]= {{1,2},{3,4}}) {     cout << test[0][0] << endl;     cout << test[1][0] << endl; }  int main() {     print();     return 0; } 

the error is: not convert '{{1, 2}, {3, 4}}' '' 'int (*)[2]'|

i beginner in c++ , still learning.

function parameters declared arrays adjusted implicitly pointers first elements.

so function declaration looks like

void print ( int ( *test )[2] = { { 1, 2 }, { 3, 4 } } ); 

and pointer may not initialized such way because scalar object.

in fact these function declarations

void print( int test[10][2] ); void print( int test[2][2] ); void print( int test[][2] ); void print( int ( *test )[2] ); 

are equivalent , declare same 1 function.

however define parameter reference array. in case expected result. example

#include <iostream>  void print ( const int ( &test )[2][2] = { { 1, 2 }, { 3, 4 } } ) {     std::cout << test[0][0] << std::endl;     std::cout << test[1][0] << std::endl; }   int main()  {     print();      int a[2][2] = { { 5, 6 }, { 7, 8 } };      print( ); }     

the program output is

1 3 5 7