> //自己的机器上VC6.0运行一点问题也没有，这是为什么？
> 
> 
> #include "iostream"
> #include "string"
> #include "math.h"
> using namespace std;
> 
> string calone(string Num1,int ch2)
> {
> 	char a[1];
> 	int ch1;
> 	string ans;
> 	int tempans;
> 	int flag=0;
> 	int length=Num1.length();
> 	for(int i=0;i<length;i++)
> 	{
> 		ch1=Num1.at(length-1-i)-48;
> 		if(flag+ch1*ch2<10)
> 		{
> 			tempans=flag+ch1*ch2;
> 			flag=0;
> 		}
> 		else
> 		{
> 			tempans=(flag+ch1*ch2)%10;
> 			flag=(flag+ch1*ch2-tempans)/10;
> 		}
> 		ans=itoa(tempans,a,10)+ans;
> 	}
> 	if(flag!=0)
> 		ans=itoa(flag,a,10)+ans;
> 	return ans;
> }
> 
> string addNum(string Num1,string Num2)
> {
> 	int length1 =  Num1.length();
> 	int length2 =  Num2.length();
> 	int tempans=0;
> 	int chaju=abs(length1-length2);
> 	string ans;
> 	int flag=0;
> 	int length=0;
> 	char a[1];
> 	int i=0;
> 	if(length1>length2)
> 	{
> 		length=length2;
> 		for( i=0;i<length;i++)
> 		{
> 			tempans=Num1.at(length+chaju-1-i)-48+Num2.at(length-1-i)-48+flag;
> 			if(tempans>9)
> 			{
> 				flag=1;
> 				tempans-=10;
> 			}
> 			else
> 			{
> 				flag=0;
> 			}
> 			ans=itoa(tempans,a,10)+ans;
> 		}
> 		for(;i<length1;i++)
> 		{
> 			tempans=Num1.at(length+chaju-1-i)-48+flag;
> 			flag=0;
> 			ans = itoa(tempans,a,10)+ans;
> 		}
> 		if(flag)
> 			ans=itoa(flag,a,10)+ans;
> 		return ans;
> 	}
> 	else
> 	{
> 		length=length1;
> 		for( i=0;i<length;i++)
> 		{
> 			tempans=Num1.at(length-1-i)-48+Num2.at(length+chaju-1-i)-48+flag;
> 			if(tempans>9)
> 			{
> 				flag=1;
> 				tempans-=10;
> 			}
> 			else
> 			{
> 				flag=0;
> 			}
> 			ans=itoa(tempans,a,10)+ans;
> 		}
> 		for(;i<length2;i++)
> 		{
> 			tempans=Num2.at(length+chaju-1-i)-48+flag;
> 			flag=0;
> 			ans = itoa(tempans,a,10)+ans;
> 		}
> 		if(flag)
> 			ans=itoa(flag,a,10)+ans;
> 		return ans;
> 	}
> }
> 
> string caltwo(string Num1,string Num2)
> {
> 	int length2 =  Num2.length();
> 	string zero="";
> 	if(length2==1)
> 		return calone(Num1,Num2.at(0)-48);
> 	else
> 	{
> 		string ans="0";
> 		for(int i = 0;i<length2;i++)
> 		{
> 			zero="";
> 			for(int j=0;j<i;j++)
> 				zero=zero+'0';
> 			ans=addNum(ans,calone(Num1,Num2.at(length2-1-i)-48)+zero);
> 		}
> 		return ans;
> 	}
> 	
> }
> 
> int main()
> {
> 	string Num1;
> 	int wei=0;
> 	string s1;
> 	int n;
> 	int length;
> 	string ans;
> 	string bei;
> 	bool flag=0;
> 	while(cin>>Num1>>n)
> 	{
> 		length=Num1.length();
> 		while(Num1.at(length-1)=='0')
> 		{
> 			length--;
> 			Num1.erase(length);
> 		}
> 		s1=Num1;
> 		wei = s1.find_first_of('.',0);
> 		wei=length-wei-1;
> 		s1.erase(length-wei-1,1);
> 		bei=s1;
> 		ans=s1;
> 		for(int j=0;j<n-1;j++)
> 			ans=caltwo(ans,bei);
> 		int anslength = ans.length();
> 		ans.insert(anslength-wei*n,1,'.');
> 		cout<<ans<<endl;
> 		wei=0;
> 		length=0;
> 	}
> 	return 0;
> }