#include#includeclass base{public:base(){}virtual void area(

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#include
#include
class base
{
public:
base(){}
virtual void area()=0;
};
class triangle:public base
{
triangle(float a,float b,float c)
{
x=a;
y=b;
z=c;
}
void area()
{
float p,t_area;
p=((x+y+z)/2.0);
t_area=(sqrt)(p*(p-x)*(p-y)*(p-z));
cout

里面的计算可以省略一点
#include
#include
using namespace std;
class base
{
public:
base(){}
virtual void area()=0;
};
class triangle:
public base
{
public:
triangle(float a,float b,float c)
{
x=a; y=b; z=c;
}
void area()
{
float p;
p=((x+y+z)/2.0);
cout

c++矩阵的加法 #include#includeclass matrix{public:void setvalue() #include class base { Private:int x,y; public:void setxy(int a base area?curved surface? #include class A { public: int n; }; class B:virtual public #include class A { public:void print1() { cout c++题天空#includeclass Point{public:void Init(int initX,int ini fan base意思BASE?. BASE是什么意思? Power,base Base Control 英语翻译base base用法