The problem is to convert the given binary number (represented as string) to its equivalent octal number. The input could be very large and may not fit even into unsigned long long int.
Input : 110001110 Output : 616 Input : 1111001010010100001.010110110011011 Output : 1712241.26633
The idea is to consider the binary input as a string of characters and then follow the steps:
- Get length of substring to the left and right of the decimal point(‘.’) as left_len and right_len.
- If left_len is not a multiple of 3 add min number of 0’s in the beginning to make length of left substring a multiple of 3.
- If right_len is not a multiple of 3 add min number of 0’s in the end to make length of right substring a multiple of 3.
- Now, from the left extract one by one substrings of length 3 and add its corresponding octal code to the result.
- If in between a decimal(‘.’) is encountered then add it to the result.
Octal number = 1712241.26633
Time Complexity: O(n), where n is the length of string.
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