Item 3-Multi-file organization of the program for the third week

Re-implement Project 2 with multi-file organization. Among them, the entire project consists of 3 files:
Main file: Main.cpp, which defines the main () function
Header files: triangle.h, header files, declaring classes, defining built-in member functions
Class definition file: Triangle.cpp, which defines other member functions in class triangle

Note that the 3 set functions and 3 get functions are designed as built-in member functions, and other functions are not used as built-in functions.

Main.cpp

/** Copyright (c) 2015, Yantai University School of Computer * All right reserved.* Shao * file: demo.cpp* finish: March 21, 2015 * version number: v1.0*/#include <iostream > #include <cmath> #include <c:\users\mayuko2012\desktop\demo\triangle.h>using namespace Std;int main ( {    Triangle tri1;//defines an instance (object) of a triangle class    double x, y, Z;    cout<< "Please enter three sides of the triangle:";    cin>>x>>y>>z;    Tri1.seta (x);    Tri1.setb (y);    Tri1.setc (z);//For the three-side initial value    if (Tri1.istriangle ())    {        cout<< "three edges are:" <<tri1.geta () << ', ' <<TRI1.GETB () << ', ' <<tri1.getc () <<endl;        cout<< "The perimeter of the triangle is:" << tri1.perimeter () << ' \ t ' << "area:" << tri1.area () <<endl;    }    else        cout<< "cannot make a triangle" <<endl;    return 0;}

Triangle.cpp

#include <c:\users\mayuko2012\desktop\demo\triangle.h>\\ A custom header file requires an absolute path #include<cmath>bool triangle:: Istriangle () {    if (a+b>c && a+c>b && b+c>a)        return true;    else        return false;} Double Triangle::p erimeter () {    return (a+b+c);} Double Triangle::area () {    double p,s;    p= (A+B+C)/2;    S=sqrt (p* (p-a) * (p-b) * (p-c));    return s;}

Triangle.h

#ifndef triangle_h_included#define triangle_h_includedclass triangle{public:    void SetA (double x)    {        a=x;    } ;    void Setb (double y)    {        b=y;    };    void SetC (double z)    {        c=z;    };    Double Geta ()    {        return A;    };    Double Getb ()    {        return b;    };    Double GetC ()    {        return C;    };    Double perimeter (void);//Calculates the perimeter of a triangle with    double area (void),//calculates and returns the square of the triangle,    bool Istriangle ();//Determines whether the triangle is composed of private:    double a,b,c;//three sides for private member data}; #endif//triangle_h_included

Run Pic:

@ Mayuko

Item 3-Multi-file organization of the program for the third week