#include <iostream>
#include <cstdlib>
#include <cmath>
using std::cout;
using std::endl;
using std::cin;
int main()
{
double a,b,c,h,v,w,x,y,z,tolerance,series,series1;
tolerance=0.01;
cout << "Enter the width, W: ";
cin >> w;
if (w<0)
{
cout << "Error: The Width must be...