项目一 用类处理三角形的问题1.1

</pre><pre name="code" class="cpp">/*
*copyright (c) 2015,
*All rights reserved
*The Author:王争取
*Finished Time:2015.3.23
*/
#include <iostream>
#include <cmath>
using namespace std;
class Triangle
{
public:
    void setABC(double x,double y,double z);
    void getABC(double *x,double *y,double *z);
    double perimeter();
    double area();
private:
    double a,b,c;
};
int main()
{
    Triangle tri1;
    tri1.setABC(3,4,5);
    double x,y,z;
    tri1.getABC(&x,&y,&z);
    cout<<"三条边为："<<x<<'\t'<<y<<'\t'<<z<<'\t';
    cout<<"三角形的周长为："<<tri1.perimeter()<<'\t'<<"三角形的面积为："<<tri1.area()<<endl;
    return 0;
}
void Triangle::setABC(double x,double y,double z)
{
    a=x;
    b=y;
    c=z;
}
void Triangle::getABC(double *x,double *y,double *z)
{
    *x=a;
    *y=b;
    *z=c;
}
double Triangle::perimeter()
{
    return (a+b+c);
}
double Triangle::area()
{
    double p;
    p=perimeter()/2;
    return (sqrt(p*(p-a)*(p-b)*(p-c)));
}

对我来说拥有良好的思路和和平静的心态最重要

打字速度是硬伤，容易分心，因此这个需要加以练习