include

//张开函数啦
template
void display1(T a)
{
std::cout << a << std::endl;
}

template
void display1()
{
std::cout << “void” << std::endl;
}

//逗号展开函数
template<typename T=void,typename … Args>
void display1(T first ,Args… args)
{
std::cout << first << std::endl;
display1(args…);
}

template

}

int main()
{
int a = 10;
int b = 100;
int c = 200;
display<>();//支持
display(a,b,c);
}