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A C/C++ Function Call Puzzle

  • Difficulty Level : Easy
  • Last Updated : 06 Jul, 2021

Consider the following program. Predict the output of it when compiled with C and C++ compilers.

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void func()
    /* definition */
int main()

The above program compiles fine in C, but doesn’t compile in C++.

In C++, func() is equivalent to func(void) 
In C, func() is equivalent to func(…)

Refer this for details and this for more programs that compile in C, but not in C++.

This article is compiled by Rahul Mittalal. If you like GeeksforGeeks and would like to contribute, you can also write an article and mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

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