View Compilation Error

0_0_37457856_24979.cpp:61:20: error: expected ';' before ',' token
 using Hungarian::n1, Hungarian::n2;
                    ^
0_0_37457856_24979.cpp:61:20: error: expected unqualified-id before ',' token
0_0_37457856_24979.cpp:61:35: error: expected constructor, destructor, or type conversion before ';' token
 using Hungarian::n1, Hungarian::n2;
                                   ^
0_0_37457856_24979.cpp: In function 'int main()':
0_0_37457856_24979.cpp:77:14: error: 'n2' was not declared in this scope
         n1 = n2 = 0;
              ^
0_0_37457856_24979.cpp:77:14: note: suggested alternative:
0_0_37457856_24979.cpp:16:13: note:   'Hungarian::n2'
     int n1, n2;
             ^