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Re:我确实不知道哪儿错了~~麻烦哪位大侠给指点指点~到底还要考虑什么细节啊?

Posted by liuzdof30517 at 2009-02-27 16:15:24 on Problem 1001
In Reply To:我确实不知道哪儿错了~~麻烦哪位大侠给指点指点~到底还要考虑什么细节啊? Posted by:luketyg at 2009-01-11 17:52:44
> #include "iostream"
> using namespace std;
> void Mul(char *s1, char *s2, char *Ans)
> {
> 	int a[100]={0},b[100]={0},c[256]={0};
> 	int Len1=strlen(s1),Len2=strlen(s2),Len=Len1+Len2,k=0,x,y,z,i,j,w;
> 	for(i=Len1-1;i>=0;i--)
> 		a[++k]=s1[i]-'0';
> 	k=0;
> 	for(i=Len2-1;i>=0;i--)
> 		b[++k]=s2[i]-'0';
> 	for(i=1;i<=Len1;i++)
> 		for(j=1;j<=Len2;j++)
> 		{
> 			x=a[i]*b[j];
> 			y=x/10;
> 			z=x%10;
> 			w=i+j-1;
> 			c[w]=c[w]+z;
> 			c[w+1]=c[w+1]+c[w]/10+y;
> 			c[w]=c[w]%10;
> 		}
> 		while(c[Len]==0 && Len>1) Len--;
> 		k=0;
> 		for(i=Len;i>=1;i--)
> 			Ans[k++]=c[i]+'0';
> 		Ans[k]='\0';
> }
> int main()
> {
> 	char r[6];
> 	int n;
> 	while(scanf("%s %d",r,&n)!=EOF)
> 	{
> 		int i,index,j;
> 		for(i=0;i<6;i++)
> 		{
> 			if(r[i]=='.')
> 			{
> 				index=i;
> 				for(j=i;j<5;j++)
> 					r[j]=r[j+1];
> 				r[j]='\0';
> 				break;
> 			}
> 		}
> 		char c[256];
> 		if(n==0)
> 			cout<<1<<endl;
> 		else
> 		{
> 			Mul(r,r,c);
> 			for(i=2;i<n;i++)
> 				Mul(r,c,c);
> 			int w=(5-index)*n;
> 			if(w==0)cout<<c<<endl;
> 			if(w>=strlen(c))
> 			{
> 				for(j=strlen(c)-1;j>=0;j--)
> 					if(c[j]!='0')break;
> 				if(j==-1)cout<<0<<endl;
> 				else
> 				{
> 					cout<<".";
> 				for(i=0;i<w-strlen(c);i++)
> 					cout<<0;
> 				for(i=0;i<=j;i++)
> 					cout<<c[i];
> 				cout<<endl;
> 				}
> 			}
> 			else 
> 			{
> 				for(j=strlen(c)-1;j>=0;j--)
> 					if(c[j]!='0')break;
> 				for(i=0;i<strlen(c)-w;i++)
> 					cout<<c[i];
> 				if(i!=j+1)
> 				{
> 					cout<<".";
> 					for(;i<=j;i++)
> 						cout<<c[i];
> 				}
> 				cout<<endl;
> 			}
> 		}
> 	}
> 	return 0;
> }

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