第五周 项目三-多文件组织多个类

 

main.cpp

 

#include <iostream>#include "header.h"using namespace std;int main(){    CPoint X(2,5),Y(5,2),Z(7,8);    CTriangle Tri1(X,Y,Z);    cout<<"该三角形的周长为："<<Tri1.perimeter()<<"，面积为："<<Tri1.area()<<endl<<endl;    cout<<"该三角形"<<(Tri1.isRightTriangle()?"是":"不是")<<"直角三角形"<<endl;    cout<<"该三角形"<<(Tri1.isIsoscelesTriangle()?"是":"不是")<<"等腰三角形"<<endl;    return 0;}

header.cpp

#include <iostream>#include <cmath>#include "header.h"using namespace std;CPoint::CPoint(double xx,double yy){  x=xx;  y=yy;}void CPoint::input(){  char ch;  cout<<"请输入坐标点(格式x,y )：";  while(1)  {    cin>>x>>ch>>y;    if (ch==',') break;    cout<<"输入的数据格式不符合规范，请重新输入\n";  }}void CPoint::output(){  cout<<"("<<x<<", "<<y<<")"<<endl;}double CPoint::distance1(CPoint p) const{  double d;  d=sqrt((p.x-x)*(p.x-x)+(p.y-y)*(p.y-y));  return d;}void CTriangle::setTriangle(CPoint &X,CPoint &Y,CPoint &Z){  A=X;  B=Y;  C=Z;}double CTriangle::perimeter(void){  double a=B.distance1(C),b=C.distance1(A),c=A.distance1(B);  return (a + b + c);}double CTriangle::area(void){  double a=B.distance1(C),b=C.distance1(A),c=A.distance1(B);  double s = (a + b + c) / 2;  return sqrt(s * (s - a) * (s - b) * (s - c));}bool CTriangle::isRightTriangle(){  double a=B.distance1(C),b=C.distance1(A),c=A.distance1(B);  double max=a;  if(b>max) max=b;  if(c>max) max=c;  if(((max==a)&&(abs(a*a-b*b-c*c)<1e-7))||((max==b)&&(abs(b*b-a*a-c*c)<1e-7))||((max==c)&&(abs(c*c-b*b-a*a)<1e-7)))    return true;  else    return false;}bool CTriangle::isIsoscelesTriangle(){  double a=B.distance1(C),b=C.distance1(A),c=A.distance1(B);  if((abs(a-b)<1e-7)||(abs(b-c)<1e-7)||(abs(c-a)<1e-7))    return true;  else    return false;}

 

header.h

#ifndef HEADER_H_INCLUDED#define HEADER_H_INCLUDEDclass CPoint{private:  double x;  double y;public:  CPoint(double xx=0,double yy=0);  double distance1(CPoint p) const;  void input();  void output();};class CTriangle{public:  CTriangle(CPoint &X,CPoint &Y,CPoint &Z):A(X),B(Y),C(Z){}  void setTriangle(CPoint &X,CPoint &Y,CPoint &Z);  double perimeter(void);  double area(void);  bool isRightTriangle();  bool isIsoscelesTriangle();private:  CPoint A,B,C;};#endif // HEADER_H_INCLUDED

运行结果：

 

 

 

学习心得：

 

好好学习 天天向上