如何将二进制字符串转换为整数或浮点数? [英] How to convert a binary string to an integer or a float?

问题描述

我有以下两种形式的二进制字符串:

I have binary strings in the form of either:

<<"5.7778345">>

或

<<"444555">>

我事先不知道它将是浮点数还是整数.

I do not know before hand whether it will be a float or integer.

我尝试进行检查以查看它是否为整数.由于它是二进制文件，因此不起作用.我也尝试将二进制文件转换为列表，然后检查int或float.我没有那么成功.

I tried doing a check to see if it is an integer. This does not work since it is binary. I alos tried converting binary to list, then check if int or float. I did not have much success with that.

它必须具有以下功能:

binToNumber(Bin) ->
  %% Find if int or float
  Return.

每个人都有一个很好的主意吗?

Anyone have a good idea of how to do this?

推荐答案

没有快速的方法.改用类似这样的东西:

No quick way to do it. Use something like this instead:

bin_to_num(Bin) ->
    N = binary_to_list(Bin),
    case string:to_float(N) of
        {error,no_float} -> list_to_integer(N);
        {F,_Rest} -> F
    end.

这应将二进制文件转换为列表(字符串)，然后尝试使其适合浮点数.如果无法做到这一点，我们将返回一个整数.否则，我们保留浮点数并将其返回.

This should convert the binary to a list (string), then try to fit it in a float. When that can't be done, we return an integer. Otherwise, we keep the float and return that.

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