Converting string containing binary to unsigned and signed ints

Question

I want to write program (at the moment I don't have any code), which should do the following:

Take from user string containing binary number,
Convert it to unsigned int and signed int,
Return the result to the user.

How can I implement the second activity? I'm looking for any help.

So - user gives you zeros and ones, and you have to pack it to `int`? — GingerPlusPlus, Sep 16 '14 at 19:36
I already have it in a variable... I'm just not sure what to do after that. — Alex Clark, Sep 16 '14 at 19:37
Just convert the binary to unsigned and signed integers and return it to the user. — Alex Clark, Sep 16 '14 at 19:38
What exactly do you mean with "binary?" Can you give an example code where you'll encapsulate the missing functionality in a declared but not defined function, so that we can see the input/output format you expect? — Angew is no longer proud of SO, Sep 16 '14 at 19:41
I think you should read some about bitwise operators, if you want implement it yourself. — GingerPlusPlus, Sep 16 '14 at 19:41
I need to write a program in any language that takes as its input a string of either 16 or 32 binary digits that then takes that string and converts it into an unsigned and signed int. — Alex Clark, Sep 16 '14 at 19:42
I suggest you write the program in LISP or SNOBOL. This should be challenging as neither language has implicit facilities for handling bits. — Thomas Matthews, Sep 16 '14 at 20:37

score 1 · Answer 1 · answered Sep 16 '14 at 20:35

I suggest you develop your own algorithm using pen and paper:

For each digit in string do:
  value = digit - '0'; convert from text to internal representation.
  binary number <<= 1; Move the existing bits left by one to make room.
  binary number |= value;  put the digit into the binary number.
  right shift string.
end-for.

Or you can write your own code, test it and debug it, then if you have any questions, post them (along with the code) as a new question.

Converting string containing binary to unsigned and signed ints

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