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  1. #include <iostream>
  2.  
  3. void foo(); // My function declaration
  4.  
  5. int main()
  6. {
  7.     foo(); // To use this function it must be declared and defined
  8.  
  9.     return 0;
  10. }
  11.  
  12. // The function definition
  13. void foo()
  14. {
  15.     std::cout << "foo\n";
  16. }
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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foo
https://ideone.com/zI485n
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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