先来 项目三 多组织文件

//头文件class Triangle{public:void setA(double x){a=x;};void setB(double x){b=x;};void setC(double x){c=x;};double getA(){return a;};double getB(){return b;};double getC(){return c;};double perimeter(void);//计算三角形的周长double area(void);//计算并返回三角形的面积bool isTriangle();//判断是否为三角形private:double a,b,c; //三边为私有成员数据   };

//判断是否为三角的函数#include "Triangle.h"#include<iostream>#include <Cmath>using namespace std;bool Triangle::isTriangle()//判断是否为三角形{double num;int i=0;bool t=true;do{if(a+b>c&&a-b<c){num=a;a=b;b=c;c=num;i++;}else{cout<<"三边构不成三角形！";t=false;break;}if(i==3)break;}while(i<=3);return t;}

//main文件#include<iostream>#include "Triangle.h"#include<cmath>using namespace std;int main(){Triangle tri1;//定义三角形类的一个实例（对象）double x,y,z;cout<<"请输入三角形的三边：";cin>>x>>y>>z;tri1.setA(x);tri1.setB(y);tri1.setC(z);//为三边置初值if(tri1.isTriangle()){ cout<<"三条边为："<<tri1.getA()<<','<<tri1.getB()<<','<<tri1.getC()<<endl;cout<<"三角形的周长为："<< tri1.perimeter()<<'\t'<<"面积为："<< tri1.area()<<endl;}elsecout<<"不能构成三角形"<<endl;system("pause");return 0;}double Triangle::perimeter()//周长{return (a+b+c);}double Triangle::area(){double z;z=(a+b+c)/2;return (sqrt(z*(z-a)*(z-b)*(z-c)));}

多组织文件 so easy