1viii.cpp

C/C++程序设计导论（第二版）》程序源文件

// Calculate total surface area of a truncated right-circular cone
#include <iostream.h>
void main()
{	float minor_radius, major_radius;					// cone top and bottom radii
	float height, side;					// cone height and side length
	float surface_area;					// total cone surface area
	float sum_of_squares, 
		  radii_product;				//sub-expression values  in formula
// prompt user and input needed variables
	cout << "enter major and minor radii ";
	cin >> major_radius >> minor_radius;
	cout << "enter cone height and side length ";
	cin >> height >> side;
// calculate area formula using sub-expressions
	sum_of_squares = major_radius*major_radius +
 		minor_radius*minor_radius;
	radii_product = (major_radius + minor_radius) * side;
	surface_area = 3.14 * (sum_of_squares + radii_product);
// display results and input data
	cout << "radii: " << major_radius << "," << minor_radius << endl;
	cout << "height and side: " << height << "," << side << endl;
	cout << "total surface area: " << surface_area << endl;
}