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发表于 2020-7-23 17:30:01
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显示全部楼层
template<int i1,int i2>
class One
{
template<int ii1,int ii2> friend ostream& operator<<(ostream&,const One<ii1,ii2>&);
template<int ii1,int ii2> friend void fun2(const One<ii1,ii2>&);
};
template<int ii1,int ii2> ostream& operator<<(ostream&x,const One<ii1,ii2>&){return x;}
template<int ii1,int ii2> void fun2(const One<ii1,ii2>&){}
template<class T>
class Two
{
template<class TT> friend ostream& operator<<(ostream&,const Two<TT>&);
template<class TT> friend void fun1(const Two<TT>&);
};
template<class TT> ostream& operator<<(ostream&x,const Two<TT>&){return x;}
template<class TT> void fun1(const Two<TT>&){} |
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