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int main()
{ A *a=new B(15);
delete a; return 0; } 4¡¢
#include
class C: public A, public B {public: }; int main() {
C cc; cc.B::f();
void g(){cout<<\ void f() {cout<<\
void g() {cout<<\ void f(){cout<<\
cc.B::g();
cc.g(); Call B's function f()
Call B's function g() Call C's function g() }
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1¡¢£¨10·Ö£© ÒÑÖª¸´ÊýÀàComplexµÄÉùÃ÷ÈçÏ£º class Complex {public:
Complex(); //Î޲ι¹Ô캯Êý Complex(double ); //ת»»¹¹Ô캯Êý
Complex(double, double); //ÓÐÁ½¸öÐβεĹ¹Ô캯Êý
friend Complex operator+(Complex&, Complex&); //¶Ô¡°+¡±ÔËËã·û½øÐÐÖØÔØ friend ostream& operator<<(ostream&, Complex&); //¶Ô¡°<<¡±ÔËËã·û½øÐÐÖØÔØ friend istream& operator>>(istream&, Complex&); //¶Ô¡°>>¡±ÔËËã·û½øÐÐÖØÔØ private:
double real,imag; };
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return 0;
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double total(Shape *s[ ], int n) { double sum=0.0;
for(int i=0; i
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return sum;
virtual double area()=0;
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