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断断续续花了几天的时间,终于AC了,纪念一下0MS,分享一下代码(虽然有些部分是参考别人的)的)

Posted by fegar at 2011-08-13 15:06:28 on Problem 1001
#include <stdio.h>
#include <string.h>
int result[153];
int strl=5;
int tranform(char *s1,int *s2)
{
	int i,j;
	for(j=4,i=0;s1[i]!='\0';i++)
		if(s1[i]!='.'){
			s2[j--]=s1[i]-'0';
		}
	j=0;
	while(s1[j]!='.'&&s1[j]!='\0')
		j++;
	return 5-j;
}
void mul(int *s3,int a)
{
	int i,j,s4[153]={0};
	for(i=0;i<5;i++)
		for(j=0;j<strl;j++)
			s4[i+j]+=s3[i]*result[j];
	strl=i+j;
	for(i=0;i<strl;i++){
		result[i]=s4[i]%10;
		s4[i+1]+=s4[i]/10;
	}
	if(a>=1)
		mul(s3,a-1);
}
main()
{
	int i,j,k,n,bit,s[5]={0};
	char R1[7];
	while(scanf("%s%d",R1,&n)!=EOF){
		if(n==0)
			printf("1");
		else{
			bit=tranform(R1,s);
		    for(i=0;i<5;i++)
				result[i]=s[i];
			if(n>1)
				mul(s,n-2);
			bit=n*bit;
			for(i=strl-1,j=0;result[i]==0&&i>bit-1;i--)
				j++;
			for(i=0,k=0;result[i]==0&&i<=bit-1;i++)
				k++;
			for(i=strl-1-j;i>bit-1;i--)
				printf("%d",result[i]);
			if(k!=bit)
				printf(".");
			for(i=bit-1;i>=k;i--)
				printf("%d",result[i]);
			printf("\n");
			strl=5;
		}
	}
}

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