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Home C Programming Variable Number of Arguments See What Others Are Saying!
  • Question
  • Point out the error if any in the following program (Turbo C).
    #include<stdio.h>
    #include<stdarg.h>
    void display(int num, ...);
    
    int main()
    {
        display(4, 'A', 'a', 'b', 'c');
        return 0;
    }
    void display(int num, ...)
    {
        char c; int j;
        va_list ptr;
        va_start(ptr, num);
        for(j=1; j<=num; j++)
        {
            c = va_arg(ptr, char);
            printf("%c", c);
        }
    }
    


  • Options
  • A. Error: unknown variable ptr
  • B. Error: Lvalue required for parameter
  • C. No error and print A a b c
  • D. No error and print 4 A a b c

  • Correct Answer
  • No error and print A a b c 


  • More questions

    • 1. Bitwise can be used to reverse a sign of a number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 2. Is it necessary that in a function which accepts variable argument list there should be at least be one fixed argument?

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 3. Bitwise can be used to generate a random number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 4. A function that receives variable number of arguments should use va_arg() to extract the last argument from the variable argument list.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Bitwise & can be used to check if more than one bit in a number is on.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. The preprocessor can trap simple errors like missing declarations, nested comments or mismatch of braces.

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. It is necessary that a header files should have a .h extension?

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 8. Bitwise | can be used to set multiple bits in number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 9. Bitwise & can be used to check if a bit in number is set or not.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. A pointer union CANNOT be created

    • Options
    • A. Yes
    • B. No
    • Discuss


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