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Concerning the modulus % sign

 
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Concerning the modulus % sign
TheMagnitude
19 Jan, 2008 - 03:17 PM
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CODE

#include <math.h>
#define PI 3.14159265

float angleDist(float a,float b) // in radians, finds distance between 2 angles
{
    return fabs((((  (a-b) % 2*PI)  +3*PI) % 2*PI)-PI);
}


I get a compile error:

invalid operands of types `float' and `int' to binary `operator%'

Does the modulus sign only work with int?
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Max_Payne
RE: Concerning The Modulus % Sign
19 Jan, 2008 - 05:22 PM
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The error is because the % operator only works on integers.


You can use fmod,
Syntax:
CODE

  #include <cmath>
  double fmod( double x, double y );


The fmod() function which takes two doubles and returns the remainder of x/y.

ej:
fmod(13.0, 2.25) is 1.75
fmod(13.0, 2.50) is 0.5

This post has been edited by Max_Payne: 19 Jan, 2008 - 05:26 PM
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