Source: Internet
Author: User

03: Octal Decimal
Total time limit:
Memory Limit:

Octal finite decimals can be represented precisely in decimal finite decimals. For example, 0.75 in octal is equal to 0.963125 (7/8 + 5/64) in decimal. All octal decimals with a post-decimal number of n can be represented as decimal decimals with no more than 3n decimal places.

Your task is to write a program that converts the octal decimal between (0,1) into decimal decimals.

a row that contains an octal decimal. Each decimal form is 0.d1d2d3 ... dk, here di is the octal number 0 ... 7,DK is not equal to 0 and is known to be 0 < K < 15.
Enter a line of the following form

0.d1d2d3...dk [8] = 0.d1d2d3 ... Dm [10]

Here on the left is the octal decimal number entered, and the right is an equal decimal decimal. The end of the output must not be 0, which means DM is not equal to 0. Note the space position.
Sample input
Sample output
0.75 [8] = 0.953125 [10]
questions translated from Southern African 2001
1#include <cstring>2#include <cstdio>3 using namespacestd;4 intMain () {5 intl,i;6 Chars[ -];7 DoubleN;8scanf"%s", s);9n=0;TenL=strlen (s); One  for(i=l-1;i>1; i--){ An+=s[i]-'0'; -N/=8.0; - } theprintf"%s [8] =%.45g [ten]", s,n); - return 0; -}


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