这个程序最后应该如何正确输出……

[Aha_程序猿]

/*main.cpp*/]
#include<iostream>
#include<vector>
#include<algorithm>
#include"CShap.h"
#include"Compare.h"
using namespace std;
vector<CShap *> pShapes;
int main()
{
	int i, n;
	CRectangle* pr;
	CCricle* pc;
	CTriangle *pt;
	cout << "Please enter the number of geometry: " << endl;
	cin >> n;
	for (i = 0; i < n; i++){
		char c;
		cout << "Please enter the sharp you want to calculate:" << endl << "(R:Rectangle T:Triangle C:Cricle)" << endl;
		cin >> c;
		switch (c){
		case 'R':
			pr = new CRectangle();
			cout << "Please enter the width and high: " << endl;
			cin >> pr->width >> pr->high;
			pShapes.push_back(pr);
			break;
		case 'T':
			pt = new CTriangle();
			cout << "Please enter sides: " << endl;
			cin >> pt->a >> pt->b >> pt->c;
			pShapes.push_back(pt);
			break;
		case 'C':
			pc = new CCricle();
			cout << "Please enter radius: " << endl;
			cin >> pc->r;
			pShapes.push_back(pc);
			break;
		}
	}
	sort(pShapes.begin(), pShapes.end(),Compare);
	vector<CShap *>::iterator it;
	for (it = pShapes.begin(); it != pShapes.end(); it++){
		*it;
	}
	system("pause");
	return 0;
}

/*CShap.h*/
#include<iostream>
#include<math.h>
using std::cout;
using std::endl;
class CShap{
public:
	virtual double Area() = 0;
	virtual void PrintInfo() = 0;
};
class CRectangle :public CShap{
public:
	double width, high;
	virtual double Area();
	virtual void PrintInfo();
};
class CCricle :public CShap{
public:
	double r;
	virtual double Area();
	virtual void PrintInfo();
};
class CTriangle :public CShap{
public:
	double a, b, c;
	virtual double Area();
	virtual void PrintInfo();
};
double CRectangle :: Area(){
	return width*high;
}
void CRectangle::PrintInfo(){
	cout << "Rectangle: " << Area() << endl;
}
double CCricle::Area(){
	double pi = 3.141592653;
	return pi*r*r;
}
void CCricle::PrintInfo(){
	cout << "Cricle: " << Area() << endl;
}
double CTriangle ::Area(){
	double p = (a + b + c) / 2.0;
	return sqrt(p*(p - a)*(p - b)*(p - c));
}
void CTriangle::PrintInfo(){
	cout << "Triangle: " << Area() << endl;
}

/*Compare.cpp*/
#include"CShap.h"
bool Compare(const void*s1, const void*s2)
{
	double a1, a2;
	CShap**p1;  
	CShap**p2;
	p1 = (CShap**)s1;  
	p2 = (CShap**)s2;  
	a1 = (*p1)->Area();  
	a2 = (*p2)->Area();
	if (a1 < a2){
		return 1;
	}
	else{
		return 0;
	}
}

/*CShap.h*/
#ifndef CShap_h
#define CShap_h
#include<iostream>
#include<math.h>
using std::cout;
using std::endl;
class CShap{
public:
	virtual double Area() = 0;
	virtual void PrintInfo() = 0;
};
class CRectangle :public CShap{
public:
	double width, high;
	virtual double Area();
	virtual void PrintInfo();
};
class CCricle :public CShap{
public:
	double r;
	virtual double Area();
	virtual void PrintInfo();
};
class CTriangle :public CShap{
public:
	double a, b, c;
	virtual double Area();
	virtual void PrintInfo();
};
#endif

/*Compare.h*/
#ifndef Compare_h
#define Compare_h
#include"CShap.h"
bool Compare(const void*s1, const void*s2);
#endif

然后运行到这里就出问题了。。。

[Aha_程序猿]

还有就是最后应该怎么设置输出……我是想调用类定义中的PrintInfo()函数实现输出……所以我应该怎么写？之前想的是it->PrintInfo();可是无法通过编译……

[mewiteor]

Compare的参数类型好像应该都是const CShap* &

[mewiteor]

(*it)->PrintInfo();

[mewiteor]

引用 2 楼 mewiteor 的回复:

Compare的参数类型好像应该都是const CShap* &

写错了，应该是

CShap* const &

[Aha_程序猿]

引用 4 楼 mewiteor 的回复:

[quote=引用 2 楼 mewiteor 的回复:] Compare的参数类型好像应该都是const CShap* &

写错了，应该是

CShap* const &

[/quote]

[Aha_程序猿]

引用 3 楼 mewiteor 的回复:

(*it)->PrintInfo();