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What is the output of this C code?

int x;
    void main()
    {
        printf("%d", x);
    }

 

  • A.Junk value
  • B.Run time error
  • C.Undefined
  • D.0

Answer: D

Correct answer: 0

A variable at file scope has static storage duration, and every such object is zero-initialised before the program starts - it is not left holding junk, as an uninitialised automatic variable would be. So the value printed is 0.

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