ADTs, Data Structures, and Problem Solving with C++ 2nd Edition by Larry Nyhoff

تمرين 28

To convert a binary numeral to octal, group the digits in groups of three, starting from the binary point (or from the right end if there is none), and replace each group with the corresponding octal digit. For example,

Convert the binary numerals in Exercises 25-30 to octal numerals.
0111111111111111111