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Home C Programming Floating Point Issues See What Others Are Saying!
  • Question
  • What will be the output of the program?
    #include<stdio.h>
    #include<math.h>
    int main()
    {
        printf("%d, %d, %d\n", sizeof(3.14f), sizeof(3.14), sizeof(3.14l));
        return 0;
    }
    


  • Options
  • A. 4, 4, 4
  • B. 4, 8, 8
  • C. 4, 8, 10
  • D. 4, 8, 12

  • Correct Answer
  • 4, 8, 10 

    Explanation
    sizeof(3.14f) here '3.14f' specifies the float data type. Hence size of float is 4 bytes.

    sizeof(3.14) here '3.14' specifies the double data type. Hence size of float is 8 bytes.

    sizeof(3.14l) here '3.14l' specifies the long double data type. Hence size of float is 10 bytes.

    Note: If you run the above program in Linux platform (GCC Compiler) it will give 4, 8, 12 as output. If you run in Windows platform (TurboC Compiler) it will give 4, 8, 10 as output. Because, C is a machine dependent language.


    More questions

    • 1. Which of the following statements correct about k used in the below statement?
      char ****k;

    • Options
    • A. k is a pointer to a pointer to a pointer to a char
    • B. k is a pointer to a pointer to a pointer to a pointer to a char
    • C. k is a pointer to a char pointer
    • D. k is a pointer to a pointer to a char
    • Discuss
    • 2. What will be the output of the program?
      #include<stdio.h>
      
      void fun(void *p);
      int i;
      
      int main()
      {
          void *vptr;
          vptr = &i;
          fun(vptr);
          return 0;
      }
      void fun(void *p)
      {
          int **q;
          q = (int**)&p;
          printf("%d\n", **q);
      }
      

    • Options
    • A. Error: cannot convert from void** to int**
    • B. Garbage value
    • C. 0
    • D. No output
    • Discuss
    • 3. What will be the output of the program?
      #include<stdio.h>
      #include<string.h>
      
      int main()
      {
          static char s[] = "Hello!";
          printf("%d\n", *(s+strlen(s)));
          return 0;
      }
      

    • Options
    • A. 8
    • B. 0
    • C. 16
    • D. Error
    • Discuss
    • 4. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          int i=4, j=8;
          printf("%d, %d, %d\n", i|j&j|i, i|j&&j|i, i^j);
          return 0;
      }
      

    • Options
    • A. 4, 8, 0
    • B. 1, 2, 1
    • C. 12, 1, 12
    • D. 0, 0, 0
    • Discuss
    • 5. What will you do to treat the constant 3.14 as a float?

    • Options
    • A. use float(3.14f)
    • B. use 3.14f
    • C. use f(3.14)
    • D. use (f)(3.14)
    • Discuss
    • 6. What will be the output of the program if value 25 given to scanf()?
      #include<stdio.h>
      
      int main()
      {
          int i;
          printf("%d\n", scanf("%d", &i));
          return 0;
      }
      

    • Options
    • A. 25
    • B. 2
    • C. 1
    • D. 5
    • Discuss
    • 7. In the statement expression1 >> expression2. if expression1 is a signed integer with its leftmost bit set to 1 then on right shifting it the result of the statement will vary from computer to computer

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. What do the following declaration signify?
      int *ptr[30];

    • Options
    • A. ptr is a pointer to an array of 30 integer pointers.
    • B. ptr is a array of 30 pointers to integers.
    • C. ptr is a array of 30 integer pointers.
    • D. ptr is a array 30 pointers.
    • Discuss
    • 9. Range of float id -2.25e+308 to 2.25e+308

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. What will be the output of the program (in Turbo C under DOS)?
      #include<stdio.h>
      
      int main()
      {
          char huge *near *far *ptr1;
          char near *far *huge *ptr2;
          char far *huge *near *ptr3;
          printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3));
          return 0;
      }
      

    • Options
    • A. 4, 4, 8
    • B. 2, 4, 4
    • C. 4, 4, 2
    • D. 2, 4, 8
    • Discuss


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