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  1. #include <iostream>
  2. using namespace;
  3.  
  4. int main()
  5. {
  6.    cout << "Hello, world!";
  7.    return 0;
  8. }
  9.  
Compilation error #stdin compilation error #stdout 0s 15232KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:2:16: error: expected identifier before ‘;’ token
 using namespace;
                ^
prog.cpp: In function ‘int main()’:
prog.cpp:6:4: error: ‘cout’ was not declared in this scope
    cout << "Hello, world!";
    ^~~~
prog.cpp:6:4: note: suggested alternative:
In file included from prog.cpp:1:0:
/usr/include/c++/6/iostream:61:18: note:   ‘std::cout’
   extern ostream cout;  /// Linked to standard output
                  ^~~~
stdout
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Standard output is empty
https://ideone.com/8FL4qj
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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