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c:math.h:fabs

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c:math.h:fabs [2013/01/22 22:02] (current)
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 +{{keywords>wiki library source code example reference}}
 +===== fabs =====
 +<code c>
 +    double fabs(double);
 +</code>
 +calculates the absolute number of a given value
  
 +===== C Sourcecode Example =====
 +compile in linux with: gcc fabs.c -o fabs **-lm** -Wall
 +<code c>     
 +#include <stdio.h> /* including standard library */
 +//#include <windows.h> /* uncomment this for Windows */
 +
 +#include <math.h> /* including math library */
 +
 +int main ( void ) 
 +{
 +double y,x;
 +x = 4.2422;
 +y = -3284.2;
 +printf("the fabs of 4.2422 is %f\n", fabs(x) );
 +printf("and the fabs of -3284.2 is %f\n ", fabs(y) );
 +return 0;
 +}
 +
 +</code>
 +
 +==== output ====
 +   output:
 +   user@host:~$ ./fabs 
 +   the fabs of 4.2422 is 4.242200
 +   and the fabs of -3284.2 is 3284.200000
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c/math.h/fabs.txt · Last modified: 2013/01/22 22:02 (external edit)

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