C Programming - Floating Point Issues

Why C Programming Floating Point Issues?

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You can easily solve all kind of C Programming questions based on Floating Point Issues by practicing the objective type exercises given below, also get shortcut methods to solve C Programming Floating Point Issues problems.

Exercise :: Floating Point Issues - General Questions


What are the different types of real data type in C ?

A. float, double
B. short int, double, long int
C. float, double, long double
D. double, long int, float

Answer: Option C


The floating point data types are called real data types. Hence float, double, and long double are real data types.


What will you do to treat the constant 3.14 as a long double?

A. use 3.14LD
B. use 3.14L
C. use 3.14DL
D. use 3.14LF

Answer: Option B


Given 3.14 is a double constant.

To specify 3.14 as long double, we have to add L to the 3.14. (i.e 3.14L)


If the binary eauivalent of 5.375 in normalised form is 0100 0000 1010 1100 0000 0000 0000 0000, what will be the output of the program (on intel machine)?

int main()
    float a=5.375;
    char *p;
    int i;
    p = (char*)&a;
    for(i=0; i<=3; i++)
        printf("%02x\n", (unsigned char)p[i]);
    return 0;

A. 40 AC 00 00
B. 04 CA 00 00
C. 00 00 AC 40
D. 00 00 CA 04

Answer: Option C


No answer description available for this question. Let us discuss.


Which of the following range is a valid long double (Turbo C in 16 bit DOS OS) ?

A. 3.4E-4932 to 1.1E+4932
B. 3.4E-4932 to 3.4E+4932
C. 1.1E-4932 to 1.1E+4932
D. 1.7E-4932 to 1.7E+4932

Answer: Option A


The range of long double is 3.4E-4932 to 1.1E+4932


Which statement will you add in the following program to work it correctly?

int main()
    printf("%f\n", log(36.0));
    return 0;

A. #include<conio.h>
B. #include<math.h>
C. #include<stdlib.h>
D. #include<dos.h>

Answer: Option B


math.h is a header file in the standard library of C programming language designed for basic mathematical operations.

Declaration syntax: double log(double);