I can not get the checkD() function to work properly. What am I doing wrong? /*

ID: 3738282 • Letter: I

Question

I can not get the checkD() function to work properly. What am I doing wrong?

/* Bryce Marshall

Project 3

Section: 004r

Purpose: To approximate the volume of minor phase in a new composite

material by analyzing a rectangular parallelepiped.

To determine what % of material is from cylinders

and what % of materials is bubbles. Assume that all bubbles and

cylinders are the same size.

Input: Dimensions in length, width, height.

number of cylinders

number of bubbles

radius of bubbles

height of cylinders

Output:

#include<iostream>

#include<string>

using namespace std;

double checkD(double dim, string pipe);

void check_bubs_cyls(double num, string bubbles );

double V_of_S(double radius);

double V_of_C(double height, double rad_cyls);

double vol_piped(double Height, double Length, double Width);

double percent_phase_calc(double wid_piped, double leng_piped, double hei_piped, double bubs_num, double bubs_rad, double cyl_contacts, double cyli_rad, double cyli_height);

const float PI = 3.14159;

int main()

{

double L,W,H, num_bubs,radius,num_cyls, cyl_rad, cyl_h;

cout << "Enter the height, length and width of the parallelepiped in centimeters: ";

cin >> H >> L >> W;

checkD(H, "Height of parallelepiped");

checkD(L, "Length of parallelepiped");

checkD(W, "Width of parallelepiped");

cout << "How many spherical bubbles are present in the material? ";

cin >> num_bubs;

check_bubs_cyls(num_bubs, "Number of spherical bubbles");

cout << "What is the radius of the spherical bubbles: ";

cin >> radius;

check_bubs_cyls(radius, "Bubble Radius");

cout << "Enter the number of cylinders: ";

cin >> num_cyls;

check_bubs_cyls(num_cyls, "Number of Cylinders");

cout << "What is the height and radius of the cylinder? ";

cin >> cyl_h >> cyl_rad;

check_bubs_cyls(cyl_h, "Height of Cylinders");

check_bubs_cyls(cyl_rad, "Radius of Cylinders");

percent_phase_calc(W,L,H,num_bubs, radius, num_cyls, cyl_rad, cyl_h);

return 0;

}

double checkD(double D, string P)

{

while(D < 0);

{

cout << "The " << P << " must be greater than zero"

" Please re-enter a positive value: " << endl;

cin >> D;

}

return D;

}

void check_bubs_cyls(double numb, string B)

{

while(numb <= 0);

{

cout << "Number of bubbles must be greater than or equal "

"to zero. Please re-enter a positive value for the "

<< B << " ." << endl;

}

double V_of_S(double sphere_rad)

{

int V;

V = (4.0/3.0)*PI*(sphere_rad*sphere_rad*sphere_rad);

return V;

}

double V_of_C(double how_high, double rad_cylinder)

{

int Vol;

Vol = 2.0*(rad_cylinder*rad_cylinder)*how_high;

return Vol;

}

double vol_piped(double HT, double Lth, double Wth)

{

int volume;

volume = HT*Lth*Wth;

return volume;

}

double percent_phase_calc(double piped_W, double piped_L, double piped_H, double bubble_num, double bubble_rad, double num_of_cyls, double the_cyl_rad, double the_cyl_height)

{

double perc_sec_phase;

V_of_C(the_cyl_height, the_cyl_rad);

V_of_S(bubble_rad);

vol_piped(piped_W, piped_L, piped_H);

cout << V_of_C;

cout << V_of_S;

cout << vol_piped;

return perc_sec_phase;

}

Explanation / Answer