> 贴个代码，大家帮忙评价一下，各方面，批的越狠越好，小女子在此谢过各位大侠了！
> #include<iostream>
> #include <string>
> #include <vector>
> using namespace::std;
> 
> int n;
> vector<int> r_int;
> int dot;
> 
> string power()
> {
> 	int i,j,k;
> 		
> 	//in this case, r=0
> 	for(i=0;i<5;i++)
> 	{
> 		if(r_int[i]!=0)
> 			break;
> 	}
> 	if(i==5)
> 	{
> 		string str_zero;
> 		str_zero = '0';
> 		return str_zero;
> 	}
> 
> 	vector<int> answer(n*5);
> 	answer[0]=1;
> 	for(i=0;i<n;i++)
> 	{
> 		vector<int> tmp(answer);
> 		if(n==1)
> 		{
> 			for(vector<int>::size_type ix=0,ll=0;ix!=answer.size();++ix,++ll)
> 				answer[ix] = r_int[ll];
> 		}
> 		else
> 		{				
> 			for(vector<int>::size_type ix=0;ix!=answer.size();++ix)	
> 				answer[ix] = 0;
> 
> 			for(j=0; j<5*(n-1); ++j)		
> 			{			
> 				if(tmp[j]!=0)			
> 				{		
> 					for(k=0; k<5; ++k)				
> 						answer[j+k]+=tmp[j]*r_int[k];		
> 				}		
> 			}
> 			for(j=1; j<n*5; ++j)
> 			{
> 				answer[j]+=answer[j-1]/10;
> 				answer[j-1]%=10;
> 			}
> 		}
> 	}
> 
> 	string str;
> 	str.clear();
> 	for(i=0; i<n*5; ++i)
> 		str=(char)(answer[i]+'0')+str;
> 	str.insert(n*5-dot*n, 1, '.');
> 	while(str[0]=='0')
> 		str.erase(str.begin());
> 	while(str[str.size()-1]=='0')
> 		str.erase(str.end()-1);
> 	if(str[str.size()-1]=='.')
> 		str.erase(str.end()-1);
> 
> 	return str;
> 
> }
> 
> int main()
> {	
> 	int i;
> 	char r[7];//easier to cin
> 	string ans;
> 
> 	while(cin>>r>>n)
> 	{
> 		if(n<=0 || n>25)
> 			return 0;
> 		
> 		for(i=0; i<6; ++i)
> 		{
> 			if(r[i]=='.')
> 			{
> 				dot=6-i-1;
> 				break;
> 			}
> 		}
> 		if(i==6)
> 			dot = 0;
> 		
> 		r_int.clear();
> 		for(i=5; i>=0; --i)
> 		{
> 			if(r[i]!='.')
> 				r_int.push_back(r[i]-'0');
> 		}
> 
> 		ans = power();
> 		for(i=0;i<ans.size();++i)
> 			cout<<ans[i];
> 		cout<<endl;
> 
> 	}
> 
> 	return 1;
> }