C Programming - Floating Point Issues - Discussion

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"You cannot shake hands with a clenched fist."

- Indira Gandhi

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

#include<stdio.h>
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 D

Explanation:

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

Declaration syntax: double log(double);

Vinay Airan said: (Tue, Jul 20, 2010 09:35:52 AM)

#include<stdio.h> #include<math.h> int main() { printf("%f\n", log(36.0)); return 0; } While i compile this code there is an error like.. In function `main': undefined reference to `log' why??

Kumar said: (Wed, Jul 21, 2010 12:53:27 AM)

Since C is a compiler dependent language, it may give different outputs at different platforms. Here the Turbo-C Compiler (Windows) output has been given. Please try the above programs in Windows (Turbo-C Compiler) and Linux (GCC Compiler), you will understand the difference better.

Varun said: (Mon, Apr 4, 2011 09:00:47 AM)

What should be added here (in this case) to make output correct.

Devendra said: (Sat, Aug 20, 2011 05:00:59 PM)

If we use stdio.h,ans. is -.000901 and using math.h ans is -.001263 Why is it different?

Hajmaldeen said: (Tue, Dec 20, 2011 10:40:34 AM)

How to run this program to unix?