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help!!为什么都是WA!

Posted by redbox at 2006-03-29 19:58:23 on Problem 1001
#include <stdio.h>
#define M 125
void main()
{
	int R[M];
	float r1;
	int   r,n,i,l=0;
	int   f;//要打印的小数长度;
	int   a;//要打印的整数长度;
	
	//
	while(scanf("%f %d",&r1,&n)!=EOF)
	{
		i=125;	//
	while(--i) R[i]=0;
	if(10.00<=r1&&r1<99.999)    f=3*n,a=2*n,r=r1*1000+0.5;
	else  if(2.0<=r1&&r1<10.0)    f=4*n,a=n,r=r1*10000+0.5;
	else if(1.0<=r1&&r1<2.0)  f=4*n,a=1,r=r1*10000+0.5;
	else  a=0,f=4*n,r=r1*10000+0.5;
	//////////////////////

/////////////////////////
	R[0]=r%10;
	R[1]=(r%100)/10;
	R[2]=(r%1000)/100;
	R[3]=(r%10000)/1000;
	R[4]=(r%100000)/10000;
//////////////////////////
	while(--n)
	{
		for(i=0;i<M;i++)
			R[i]*=r;
		//
		for(l=0;l<M-2;l++){             
			R[l+1]+=R[l]/10;
			R[l]%=10;
		}
		
	}   
	
	//if(a==0){
	for(i=f+a;i>=f;i--)
	   if(R[i]!=0) break;
	for(;i>=f;i--)
		printf("%d",R[i]);
     
	 for(r=0;r<f;r++)
		   if(R[r]!=0) break;
    if(r!=f) printf("%c",'.');
      for(;i>=r;i--)
       printf("%d",R[i]);
//	}
//	else if()

       printf("%c",'\n');
	}
}

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