octal fractions.txt

以前ACM在哈工程HRBEU做的一些简单题目

#include <stdio.h>
#include <string.h>
#define MX_LEN  1000
int main()
{
 char src[MX_LEN];
 int num,index,i,j,temp;
 while(scanf("%s",src) != EOF)
 {
  char dest[MX_LEN] = {'0'};
  for(i=strlen(src)-1, index = 0; i>1; i--, index = j)
  {
   num = src[i] - '0';
   for(j=0; j<index; j++)
   {
    temp = num*10 + dest[j]-'0';
    dest[j] = temp/8+'0';
    num = temp%8;
   }
   while(num)
   {
    num *= 10;
    dest[j++] = num/8+'0';
    num %= 8;
   }
  }
  dest[j] ='\0';
  printf("%s [8] = 0.%s [10]\n",src,dest);
 }
 return 0;
}