[U]2.4.5 Fractions to Decimals 简单的语言控制题

简单的语言控制，考察代码的熟悉程度。

代码比较丑陋，但是能ac......

/*
ID:sevenst4
LANG:C++
PROG:fracdec
*/
#include<stdio.h>
using namespace std;

struct node
{
 	   int num;
 	   int left;
}p[100000];

bool flag[100001];

int main()
{
 	freopen( "fracdec.in","r",stdin );
 	freopen( "fracdec.out","w",stdout );
 	int a,b;
 	for( int i=0;i<100000;i++ )flag[i]=false;
 	
 	scanf( "%d %d",&a,&b );
 	if( a%b==0 )
 	{
	 	printf( "%d.0\n",a/b );
	 	return 0;
    }
    
    int head=0;
    if( a/b>=0 ) head++;
    if( a/b>=10 ) head++;
    if( a/b>=100 ) head++;
    if( a/b>=1000 ) head++;
    if( a/b>=10000 ) head++;
    if( a/b>=100000 ) head++;
    head++;
    
	printf( "%d.",a/b );
    a=a%b;
    flag[a]=true;
    int len=0;
    int index;
    bool loop=true;
    while( true )
    {
	 	   a*=10; p[len].num=a/b;
	 	   a=a%b; p[len].left=a;
	 	   
	 	   if( a==0 ) loop=false;
		   
		   len++;
	 	   if( flag[a]==true )
	 	   {
		   	   index=a*10%b;
	 	   	   break;
	       }
	       flag[a]=true;
    }
    
    for( int i=0;i<len;i++ )
    {
	 	 if( (i+head)%76==75 )
	 	 	 printf( "\n" );
    	 if( p[i].left!=index )
    	 	 printf( "%d",p[i].num );
    	 else
    	 {
    	 	 if( loop )
    	 	 {	 
			 	 printf( "(" );
		  	 	 for( ;i<len;i++ )
		  	 	 {
	 	 		 	  if( (i+head)%76==75 )
	 	 	 		  	  printf( "\n" );
		  	 	  	  printf( "%d",p[i].num );
				 }
			 	 printf( ")" );	
		     }
		     else
		     {
			 	 printf( "%d",p[i].num );
			 	 break;
			 }
		 }
	}
	printf( "\n" );
 	return 0;
}