/*
Author  : Michael Robinson
Program : mathFunctions.c
Purpose : math functions samples
Updated : 06-29-2014
*/


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

#define PI 3.14159265


void VariousMathFunctions()
{
    printf( "\nVarious Math Functions\n" );
    printf( "----------------------\n" );    
    printf("the abs    of %6d is = %6d\n", -20,    abs( -20 ) );
    printf("the fabs   of %6.2f is = %6.2f\n", -12.1,  fabs( -12.1 ) );
    printf("the ceil   of %6.2f is = %6.2f\n", 12.1,   ceil( 12.1 ) );
    printf("the floor  of %6.2f is = %6.2f\n", 20.9,   floor( 20.9 ) );
    printf("the fmod   of %6.2d is = %6.2f\n", 120,    fmod( 120, 5 ) );
    printf("the trunc  of %6.2f is = %6.2f\n", -20.02, trunc( -20.02 ) );
}
    

void ExponentialLogarithmicPowerFunctions()
{
    printf( "\nExponential, Logarithmic, and Power Functions\n" );
    printf( "---------------------------------------\n" );
    printf("the exp    of %d is = %f\n", 4,        exp( 4 ) );
    printf("the ldexp  of %d is = %f\n", 4,        ldexp( 4,2 ) );
    printf("the log2   of %d is = %2.0f\n", 1000000,  log2( 1000000 ) );
    printf("the log10  of %d is = %2.0f\n", 1000000,  log10( 1000000 ) );

    printf("the modf   of %.5lf is = \n", 8.12345 );
    double x, fractpart, intpart;
    fractpart = modf(8.12345, &intpart);
    printf( "              Integral part = %.5lf\n", intpart );
    printf( "              Fraction Part = %.5lf \n", modf( 8.12345, &intpart ) );

    printf("the pow    of %d is = %6.2f\n", 10,       pow( 10,2 ) );    
    printf("the sqrt   of %d is = %6.2f\n", 36,       sqrt( 36 ) );
}


void trigonometicFunctions() 
{
    printf( "\nTrigonometic Functions" );
    printf( "\n----------------------\n" );    
    printf("the cos    of %d  is =  %f\n", 16,       cos( 16 ) );
    printf("The acos   of %.1f is = %lf degrees\n", 0.9, acos( 0.9 ) * (180.0 / PI) );
    printf("the cosh   of %d  is =  %f\n", 16,       cosh( 16 ) );
    printf("the sin    of %d  is =  %f\n", 16,       sin( 16 ) );
    printf("the sinh   of %d  is =  %f\n", 16,       sinh( 16 ) );    
    printf("The asin   of %.1f is =  %lf degrees\n", 0.9, asin( 0.9 ) * (180.0 / PI) );    
    printf("the tan    of %d   is =  %f\n", 4,        tan( 4 ) );
    printf("the atan   of %d   is =  %f\n", 4,        atan( 4 ) );     
    printf("the atan2  of %d   is =  %f\n", 4,        atan2( 4,2 ) );     
}


int main()
{
    trigonometicFunctions();

    ExponentialLogarithmicPowerFunctions();

    VariousMathFunctions();    

    exit(0); //needs  #include <stdlib.h> 
}