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;
}

• Re:终于过了，代码贴出来请各位多多指教 (1913) ANT123 2013-03-10 17:16:58