C++primer plus第6版授業後のプログラミング問題の答え8.6

#include <iostream>
#include <string>
using namespace std;

template <typename AnyType>
AnyType maxn(AnyType arr[],int size)//   
{
	AnyType max=arr[0];
	for(int i=0;i<size;i++)
	{
		if(arr[i]>max)
			max=arr[i];	
	}
	return max;
};
template <>string maxn<string>(string arr[],int size)//   
{
	int max=0;//            
	int temp=0;//         
	int place=0;//        
	for(int i=0;i<size;i++)
	{
		temp=arr[i].length();
		if(temp>max)
		{
			max=temp;	
			place=i;//         
		}
	}
	//return arr[max];
	return arr[place];
};

void main86()
{
	int a[6]={10,3,50,45,33,60};
	double b[4]={4.5,6.7,2.5,3.1};
	string c[5]={"you","heheshui","oo","tianxia","end"};
	cout<<"The amax is "<<maxn(a,6)<<endl;
	cout<<"The bmax is "<<maxn(b,4)<<endl;
	cout<<"The cmax is "<<maxn(c,5)<<endl;


	system("pause");

}