?1?template<?int?N,?int?Num?>
?2?class?PowN
?3?{
?4?public:
?5???????enum
?6??????{
?7???????????result?=?Num?*?PowN<N?-?1,?Num>::result,
?8??????};
?9?};
10?
11?template<int?Num>
12?class?PowN<0,?Num>?//?注意這里的特化方式
13?{
14?public:
15????????enum
16????????{
17????????????result?=?1,
18????????};
19?};
20?
21?//?test?case:?求3的平方
22?int?main()
23?{
24?????std::cout<<"PowN<2,?3>::result"<<?PowN<2,?3>::result?<<?std::endl;
25 ??? // 但是如果用變量作為模板參數的話，必須聲明成常量
??? ?? const int n = 3;
??? ?? const int num = 10;
??? ?? std::cout<<"PowN<n, num>::result"<<?PowN<n, num>::result?<<?std::endl;
26??????return?0;
27?}
28?
posted on 2006-10-26 15:36
七星重劍 閱讀(1211)
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PL--c/c++