C++简单模板元编程

今天想用模板元编程，网上搜了下，很多用boost::mpl实现，我自己写了个简单测试了下：

#include <iostream>
using namespace std;

template <int N = 0>
struct Test
{
	Test():num(N){

	}
	int num;
	int arr[N];

	void GetNum()
	{
		printf("%d\n", num);
	}
};

int main()
{
	Test<55> test;
	test.GetNum();
}

int main()
{
	int num = 0;
	cin >> num;
	
	Test<num> test;
	test.GetNum();
}

#include <iostream>
using namespace std;

//template <int N = 0>
struct Test
{
	Test(int N):num(N){
		arr = new int[N];
	}
	~Test(){
		delete []arr;
	}
	int num;
	int *arr;

	void GetNum()
	{
		printf("%d\n", num);
	}
};

int main()
{
	int num = 0;
	cin >> num;
	
	Test test(num);
	test.GetNum();
}

C++简单模板元编程,布布扣,bubuko.com

C++简单模板元编程

原文：http://blog.csdn.net/boyxiaolong/article/details/23198233