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View Compilation Error

0_0_38534719_2831.cpp: In function 'int main()':
0_0_38534719_2831.cpp:7:11: error: 'cin' was not declared in this scope
     while(cin>>n>>m&&(n!=0||m!=0)){
           ^
0_0_38534719_2831.cpp:7:11: note: suggested alternative:
In file included from 0_0_38534719_2831.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^
0_0_38534719_2831.cpp:23:10: error: 'cout' was not declared in this scope
          cout<<"NULL"<<endl;
          ^
0_0_38534719_2831.cpp:23:10: note: suggested alternative:
In file included from 0_0_38534719_2831.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^
0_0_38534719_2831.cpp:23:24: error: 'endl' was not declared in this scope
          cout<<"NULL"<<endl;
                        ^
0_0_38534719_2831.cpp:23:24: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_38534719_2831.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:564:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^
0_0_38534719_2831.cpp:36:17: error: 'cout' was not declared in this scope
                 cout<<a[i]<<" ";
                 ^
0_0_38534719_2831.cpp:36:17: note: suggested alternative:
In file included from 0_0_38534719_2831.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^
0_0_38534719_2831.cpp:37:35: error: 'endl' was not declared in this scope
                  if(i==t-1) cout<<endl;
                                   ^
0_0_38534719_2831.cpp:37:35: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_38534719_2831.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:564:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^


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