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View Compilation Error

0_0_23106006_25394.cpp:2:6: error: expected nested-name-specifier before '&' token
 using namespace std;   
      ^
0_0_23106006_25394.cpp:2:21: error: expected identifier before '&' token
 using namespace std;   
                     ^
0_0_23106006_25394.cpp:2:26: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;   
                          ^
0_0_23106006_25394.cpp:2:27: error: 'std' does not name a type
 using namespace std;   
                           ^
0_0_23106006_25394.cpp:2:37: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;   
                                     ^
0_0_23106006_25394.cpp:2:43: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;   
                                           ^
0_0_23106006_25394.cpp:3:5: error: 'nbsp' declared as reference but not initialized
 int main(){   
     ^
0_0_23106006_25394.cpp: In function 'int main()':
0_0_23106006_25394.cpp:5:25: error: 'string' was not declared in this scope
     string str;   
                         ^
0_0_23106006_25394.cpp:5:25: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iosfwd:39:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_23106006_25394.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stringfwd.h:62:33: note:   'std::string'
   typedef basic_string<char>    string;   
                                 ^
0_0_23106006_25394.cpp:5:37: error: 'str' was not declared in this scope
     string str;   
                                     ^
0_0_23106006_25394.cpp:6:31: error: 'cin' was not declared in this scope
     while(cin>>str&&str!="0"){   
                               ^
0_0_23106006_25394.cpp:6:31: note: suggested alternative:
In file included from 0_0_23106006_25394.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_23106006_25394.cpp:8:53: error: 'nbsp' declared as reference but not initialized
         int num=0;                     
                                                     ^
0_0_23106006_25394.cpp:8:58: error: 'num' was not declared in this scope
         int num=0;                     
                                                          ^
0_0_23106006_25394.cpp:9:57: error: 'nbsp' declared as reference but not initialized
         for(int i=0;i<str.length();i++){   
                                                         ^
0_0_23106006_25394.cpp:9:62: error: 'i' was not declared in this scope
         for(int i=0;i<str.length();i++){   
                                                              ^
0_0_23106006_25394.cpp:9:80: error: expected ')' before ';' token
         for(int i=0;i<str.length();i++){   
                                                                                ^
0_0_23106006_25394.cpp:9:81: error: 'i' was not declared in this scope
         for(int i=0;i<str.length();i++){   
                                                                                 ^
0_0_23106006_25394.cpp:16:49: error: 'cout' was not declared in this scope
         cout<<num<<endl;                         
                                                 ^
0_0_23106006_25394.cpp:16:49: note: suggested alternative:
In file included from 0_0_23106006_25394.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_23106006_25394.cpp:16:60: error: 'endl' was not declared in this scope
         cout<<num<<endl;                         
                                                            ^
0_0_23106006_25394.cpp:16:60: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_23106006_25394.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_23106006_25394.cpp:20:32: error: invalid conversion from 'int*' to 'int' [-fpermissive]
     return 0;   
                                ^
0_0_23106006_25394.cpp: At global scope:
0_0_23106006_25394.cpp:21:7: error: expected constructor, destructor, or type conversion before ';' token
 }  
       ^
0_0_23106006_25394.cpp:21:13: error: expected constructor, destructor, or type conversion before ';' token
 }  
             ^


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