c++中一个关于模板的小例子

<pre name="code" class="cpp">#include<iostream>

using namespace std;

template<typename T>
T sum(T *begin,T *end){
T *p=begin;
T ans = 0;
for(T *p=begin;p!=end;p++)
{ans=ans+*p;}
return ans;
}

int main()
{
int a[3]={1,2,3};
float b[3]={0.1,0.2,0.3};
cout<<sum(a,a+3)<<'\n'<<sum(b,b+3)<<'\n'<<endl;

return 0;
}