怎么求两个面积之和啊？求帮助！！！

Question

#include
#include
class Shape
{
public :
virtual int area()=0;
};
class Trape :public Shape
{
int k,l,h;
public :
Trape (int a,int b,int c)
{
k=a;
l=b;
h=c;
}
int area()
{
cout<<"area="<<(k+l)*h/2< return 0;
}
};
class Triang :public Shape
{
int a,b,c;
public :
Triang(int a1,int b1,int c1)
{
a=a1;
b=b1;
c=c1;
}
int area()
{
int p,s;
p=(a+b+c)/2;
s=p*(p-a)*(p-b)*(p-c);
cout return 0;
}
};
int main()
{
Shape *s[2];
Trape t(1,2,3);
Triang t1(5,3,4);
s[0]=&t;
s[1]=&t1;
s[0]->area ();
s[1]->area ();

cout<<"sum="<< ?  <<endl;
return 0;

}

Answer 1

#include
using namespace std;
int main()
{
int a,b,c,d,s;
cin>>a>>b>>c>>d；
s=a*b+c*d;
cout<<"面积之和为："<<s<<endl;
return 0;

}