public class Multadd {

public static void main(String[] args) {

/* simple parameters

double a1 = 1.0;

double b1 = 2.0;

double c1 = 3.0;

System.out.println(multadd(a1, b1, c1));

*/

/* sin(pi/4) + 1/2 cos(pi/4)

double a2 = 0.5;

double b2 = Math.cos(Math.PI/4.0);

double c2 = Math.sin(Math.PI/4.0);

System.out.println(multadd(a2, b2, c2));

*/

// log10 + log20

double a3 = 1.0;

double b3 = Math.log10(10);

double c3 = Math.log10(20);

System.out.println(multadd(a3, b3, c3));

System.out.println(expSum(2));

}

public static double multadd(double a, double b, double c) {

return a * b + c;

}

public static double expSum(double x) {

double a4 = x;

double b4 = Math.exp(-x);

double c4 = Math.sqrt(1 - Math.exp(-x));

return multadd(a4, b4, c4);

}

}