#include"Fract.h"
#include<iostream>
using namespace std;
int Fract::ged(int m, int n)
{
  int v,a=m,b=n;
  v = a % b;
  while (v != 0)
  {
    a = b;
    b = v;
    v = a % b;
  }
  return b;
}
Fract Fract::add(Fract f2)
{
  int v;
  v = ged(den, f2.den);
  int com;
  com = den * f2.den / v;
  Fract f3(0,1);
  num = num * (com / den);
  f2.num = f2.num * (com / f2.den);
  f3.num = num + f2.num;
  f3.den = com;
  v = ged(f3.num, f3.den);
  f3.num = f3.num / v;
  f3.den = f3.den / v;
  return f3;
}

#include"Fract.h"
#include<iostream>
using namespace std;
int main()
{
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  Fract f1(a, b);
  Fract f2(c, d);
  Fract f3(0,1);
  f3 = f1.add(f2);
  f3.show();
  return 0;
}

const float PI = 3.14; 
#pragma once
class Circle
{
public:
  Circle(double _r)
  {
    r = _r;
  }
  double getArea()
  {
    return 3.14 * r * r;
  }
  double getGirth()
  {
    return 2 * 3.14 * r;
  }
private:
  double r;
};
#include<iostream>
using namespace std;
int main()
{
  float r;
  cout << "请输入圆的半径：";
  cin >> r;                                     //从键盘接受半径的值
    Circle c1(r);                            //将值赋值给半径并调用定义好的函数
    cout<<"圆的面积为："<<c1.getArea()<<endl;
    Circle c2(r);
    cout<<"圆的周长为："<<c2.getGirth()<<endl;
}

#include <iostream>
class Rectangle                           
{
public:
  Rectangle(void);
   Rectangle(float length,float width);  
  ~Rectangle(void);         
      float getArea();                  
      float getGirth();                  
private:
      float mLength;                    
    float mWidth;                      
};
Rectangle::Rectangle()
{
  mLength = 0; mWidth = 0;
}
Rectangle::Rectangle(float  length, float  width)
{
  mLength = length;
  mWidth = width;
}
float Rectangle::getArea()
{
  return mLength * mWidth;
}
float  Rectangle::getGirth()
{
  return 2 * (mLength + mWidth);
}
Rectangle::~Rectangle(void)
{
}
#include<iostream>
using namespace std;
int main()
{
  float m, n;                                     
  cout << "Input the Length and Width: ";
  cin >> m >> n;                                 
  Rectangle r1(m,n);     
    cout<<"The Area is: "<<r1.getArea()<<endl;
    Rectangle r2(m,n);
    cout<<"The Perimeter: "<<r2.getGirth()<<endl;
}