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View Compilation Error

0_0_19713552_28156.cpp: In function 'int main()':
0_0_19713552_28156.cpp:9:5: error: 'string' was not declared in this scope
     string line;
     ^
0_0_19713552_28156.cpp:9:5: 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_19713552_28156.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_19713552_28156.cpp:10:5: error: 'cin' was not declared in this scope
     cin >> n;
     ^
0_0_19713552_28156.cpp:10:5: note: suggested alternative:
In file included from 0_0_19713552_28156.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_19713552_28156.cpp:11:17: error: 'line' was not declared in this scope
     getline(cin,line);         //clear '\n'
                 ^
0_0_19713552_28156.cpp:11:21: error: 'getline' was not declared in this scope
     getline(cin,line);         //clear '\n'
                     ^
0_0_19713552_28156.cpp:11:21: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 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_19713552_28156.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2827:5: note:   'std::getline'
     getline(basic_istream<_CharT, _Traits>&& __is,
     ^
0_0_19713552_28156.cpp:15:9: error: 'istringstream' was not declared in this scope
         istringstream iss(line);
         ^
0_0_19713552_28156.cpp:15:9: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:38:0,
                 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_19713552_28156.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iosfwd:145:38: note:   'std::istringstream'
   typedef basic_istringstream<char>  istringstream;
                                      ^
0_0_19713552_28156.cpp:18:15: error: 'iss' was not declared in this scope
         while(iss >> a)
               ^
0_0_19713552_28156.cpp:20:36: error: 'lcm' was not declared in this scope
             xresult = lcm(xresult,a);        
                                    ^
0_0_19713552_28156.cpp:22:9: error: 'cout' was not declared in this scope
         cout << xresult << endl;
         ^
0_0_19713552_28156.cpp:22:9: note: suggested alternative:
In file included from 0_0_19713552_28156.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_19713552_28156.cpp:22:28: error: 'endl' was not declared in this scope
         cout << xresult << endl;
                            ^
0_0_19713552_28156.cpp:22:28: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_19713552_28156.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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