// 用模板實現類似於參數調用的效果
// 2013-03-22
// sina blog will automatically remove
"<" and ">"
// only tested on VS2008, not supported in
old versio like VS6.0
#include < iostream
>
#include < cstring
>
#include < cmath
>
using namespace std;
double mysin(double x)
{
return sin(x);
}
template < double
(*T)(double) > double result(double
x)
{
// almost equals
to
//
double result(double (*T)(double),double)
return T(x);
}
double result(double
(*T)(double),double x)
{
return T(x);
}
int main()
{
cout<< result < mysin
> (1.5)<<endl;
cout<< result < sin
> (1.5)<<endl;
cout<<
result(mysin,1.5)<<endl;
return 0;
}