// Testing the math library functions
#include <stdio.h>
#include <math.h>
// function main begins program execution
int main( void )
{
// calculates and outputs the square root
printf( "sqrt(%.1f) = %.1f\n", 900.0, sqrt( 900.0 ) );
printf( "sqrt(%.1f) = %.1f\n", 9.0, sqrt( 9.0 ) );
// calculates and outputs the exponential function e to the x
printf( "exp(%.1f) = %f\n", 1.0, exp( 1.0 ) );
printf( "exp(%.1f) = %f\n", 2.0, exp( 2.0 ) );
// calculates and outputs the logarithm (base e)
printf( "log(%f) = %.1f\n", 2.718282, log( 2.718282 ) );
printf( "log(%f) = %.1f\n", 7.389056, log( 7.389056 ) );
// calculates and outputs the logarithm (base 10)
printf( "log10(%.1f) = %.1f\n", 1.0, log10( 1.0 ) );
printf( "log10(%.1f) = %.1f\n", 10.0, log10( 10.0 ) );
printf( "log10(%.1f) = %.1f\n", 100.0, log10( 100.0 ) );
// calculates and outputs the absolute value
printf( "fabs(%.1f) = %.1f\n", 13.5, fabs( 13.5 ) );
printf( "fabs(%.1f) = %.1f\n", 0.0, fabs( 0.0 ) );
printf( "fabs(%.1f) = %.1f\n", -13.5, fabs( -13.5 ) );
// calculates and outputs ceil( x )
printf( "ceil(%.1f) = %.1f\n", 9.2, ceil( 9.2 ) );
printf( "ceil(%.1f) = %.1f\n", -9.8, ceil( -9.8 ) );
// calculates and outputs floor( x )
printf( "floor(%.1f) = %.1f\n", 9.2, floor( 9.2 ) );
printf( "floor(%.1f) = %.1f\n", -9.8, floor( -9.8 ) );
// calculates and outputs pow( x, y )
printf( "pow(%.1f, %.1f) = %.1f\n", 2.0, 7.0, pow( 2.0, 7.0 ) );
printf( "pow(%.1f, %.1f) = %.1f\n", 9.0, 0.5, pow( 9.0, 0.5 ) );
// calculates and outputs fmod( x, y )
printf( "fmod(%.3f/%.3f) = %.3f\n", 13.657, 2.333,
fmod( 13.657, 2.333 ) );
// calculates and outputs sin( x )
printf( "sin(%.1f) = %.1f\n", 0.0, sin( 0.0 ) );
// calculates and outputs cos( x )
printf( "cos(%.1f) = %.1f\n", 0.0, cos( 0.0 ) );
// calculates and outputs tan( x )
printf( "tan(%.1f) = %.1f\n", 0.0, tan( 0.0 ) );
} // end main
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