#include <stdio.h>
#include <stdlib.h>

#define LEAKY_RELU(x) ((x) > 0 ? (x) : 0.01 * (x))
#define PARAMETRIC_RELU(x, leak_factor) ((x) > 0 ? (x) : (leak_factor) * (x))

static float LeakyReLU( float x )
{
    return ( x > 0 ) ? x : 0.01f * x;
}

static float ParametricReLU( float x, float leak_factor )
{
    return ( x > 0 ) ? x : leak_factor * x;
}

int main()
{

    float x, l_f;

    // Leaky ReLU with fnc

    x = -2.0f;

    printf( "x: %f result: %f\n", x, LeakyReLU( x ));

    x = -1.0f;

    printf( "x: %f result: %f\n", x, LeakyReLU( x ));

    x = 0.0f;

    printf( "x: %f result: %f\n", x, LeakyReLU( x ));

    x = 1.0f;

    printf( "x: %f result: %f\n", x, LeakyReLU( x ));

    x = 2.0f;

    printf( "x: %f result: %f\n", x, LeakyReLU( x ));

    printf("\n");

    // Leaky ReLU with macro

    x = -2.0f;

    printf( "x: %f result: %f\n", x, LEAKY_RELU( x ));

    x = -1.0f;

    printf( "x: %f result: %f\n", x, LEAKY_RELU( x ));

    x = 0.0f;

    printf( "x: %f result: %f\n", x, LEAKY_RELU( x ));

    x = 1.0f;

    printf( "x: %f result: %f\n", x, LEAKY_RELU( x ));

    x = 2.0f;

    printf( "x: %f result: %f\n", x, LEAKY_RELU( x ));

    printf("\n");

    // Parametric ReLU with fnc

    l_f = 0.02f;

    x = -2.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, ParametricReLU( x, l_f ));

    x = -1.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, ParametricReLU( x, l_f ));

    x = 0.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, ParametricReLU( x, l_f ));

    x = 1.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, ParametricReLU( x, l_f ));

    x = 2.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, ParametricReLU( x, l_f ));

    printf("\n");

    // Parametric ReLU with macro

    x = -2.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, PARAMETRIC_RELU( x, l_f ));

    x = -1.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, PARAMETRIC_RELU( x, l_f ));

    x = 0.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, PARAMETRIC_RELU( x, l_f ));

    x = 1.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, PARAMETRIC_RELU( x, l_f ));

    x = 2.0f;

    printf( "x: %f l_f: %f result: %f\n", x, l_f, PARAMETRIC_RELU( x, l_f ));

    printf("\n");

}

/*

output:

x: -2.000000 result: -0.020000
x: -1.000000 result: -0.010000
x: 0.000000 result: 0.000000
x: 1.000000 result: 1.000000
x: 2.000000 result: 2.000000

x: -2.000000 result: -0.020000
x: -1.000000 result: -0.010000
x: 0.000000 result: 0.000000
x: 1.000000 result: 1.000000
x: 2.000000 result: 2.000000

x: -2.000000 l_f: 0.020000 result: -0.040000
x: -1.000000 l_f: 0.020000 result: -0.020000
x: 0.000000 l_f: 0.020000 result: 0.000000
x: 1.000000 l_f: 0.020000 result: 1.000000
x: 2.000000 l_f: 0.020000 result: 2.000000

x: -2.000000 l_f: 0.020000 result: -0.040000
x: -1.000000 l_f: 0.020000 result: -0.020000
x: 0.000000 l_f: 0.020000 result: 0.000000
x: 1.000000 l_f: 0.020000 result: 1.000000
x: 2.000000 l_f: 0.020000 result: 2.000000


*/