#include <iostream>
#include <complex>
using namespace std;
class Mycomplex : public complex
{
public:
Mycomplex():complex(0,0){}
Mycomplex()(double r,double i):complex(r,i){}
friend int operator > (Mycomplex& c1,Mycomplex& c2);
};
int operator >(Mycomplex&c1,Mycomplex& c2)
{
return abs(c1)>abs(c2);
}
template <class T>
T& Bigger (T& a,T& b)
{
return (a>b) ? a : b;
}
int main()
{
int i1 = 10, i2 = 20, i3;
double d1 = 1.1,d2 = 2.2 , d3;
Mycomplex c1(1,2),c2(3,4),c3;
i3 = Bigger(i1,i2);
d3 = Bigger(d1,d2);
c3 = Bigger(c1,c2);
return 0;
}
编译错误如下:
E:\C++Language\WorkArea\Test070504\testmain.cpp(7) : error C2955: 'complex' : use of class template requires template argument list
c:\program files\microsoft visual studio\vc98\include\complex(267) : see declaration of 'complex'
E:\C++Language\WorkArea\Test070504\testmain.cpp(7) : fatal error C1903: unable to recover from previous error(s); stopping compilation
