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Discussion :: Control Structures

  1. What is the right choice, if the following loop is implemented?

    void main()
    {
       int num = 0;
       do{
          --num;
          printf("%d", num);
       }while( ++num >= 0 );
    }
    2. A.

     A run time error will be generated.
    B.

     The program will not enter into the loop.
    C.

     There will be a compilation error reported.
    D.

     The loop will run infinitely many times.
    E.

     Prints the value of 0 one time only.

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    Answer : Option D

    Explanation :

    As the value of num is decremented(--num) and again incremented(++num) and hence no change in num and it remains 0 only causing infinite loop.

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