Week 5 Project 1 design triangles

Machine purpose: omitted

Computer content: omitted

/** Copyright and version declaration section of the Program * copyright (c) 2012, student * All rightsreserved from computer College of Yantai University. * file name: object. CPP * Author: Liu Yujin * Completion Date: July 15, March 29, 2013 * version: V1.0 * input Description: none * Problem description: triangle side length, circumference and area * program output: triangle side length, circumference, and area */# include <iostream> # include <cmath> using namespace STD; Class triangle {public: Double perimeter (void ); // calculate the triangle perimeter double area (void); // calculate and return the Triangle Area triangle (Double X = 1, Double Y = 1, Double Z = 1 ): A (x), B (Y), C (z) {} void showmessage (); Private: Double A, B, C; // the three sides are private member data }; void triangle: showmessage () {cout <"the three sides of the triangle are: "<A <" "<B <" "<C <Endl; cout <" the circumference of the triangle is: "<perimeter () <'\ t' <"Area:" <area () <Endl;} void main () {triangle tri1; // defines an instance (object) of the triangle class. A default constructor is required. The initial values of the three sides are 1tri1. showmessage (); triangle tri2 (, 9); // defines an instance of the triangle class (object) tri2.showmessage ();} double triangle: Perimeter (void) {double per; per = A + B + C; return per;} double triangle: Area (void) {Double P; P = (A + B + C)/2; return SQRT (p * (p-a) * (p-B) * (p-C ));}

Running result:

Experience: omitted