在整数小数重presentation分离数字 [英] Separating digits in decimal representation of integer

问题描述

我想利用用户输入的输入作为一个整数，例如（45697），和前两位别的东西存放在数组，向量，或如（4 5 6 9 7），这样我就可以再使用一些函数调用来检查的前两个值（4 5）并对其进行计算。

I want to take user input entered as an integer, for example (45697), and store the first two digits in an array, vector, or something else such as ( 4 5 6 9 7 ), so that I could then use some function call to check for the first two values (4 5) and perform calculations on them.

问题：我不知道如何存储追回这些前两个值

The Problem: I don't know how to store the recover those first two values.

有一个简单的函数调用？或者，我必须首先存储输入任何数组，然后提取前两个值，如果是这样，怎么样？

Is there a simple function call? Or would I have to store the input first as any array and then extract the first two values, and if so, how?

推荐答案

您可以轻松地使用转换到/从字符串做到这一点：

You can do it easily using conversions to/from strings:

>> x = 45697; % or whatever positive value
>> str = num2str(x);
>> y = [str2num(str(1)) str2num(str(2))]

y =

     4     5

这假定号 X 为正（如果它是消极的第一个字符不会是一个数字）。这似乎是的情况下，由于根据你的意见将其重新presents的电阻

This assumes that the number x is positive (if it were negative the first character would not be a digit). That seems to be the case, since according to your comments it represents an electrical resistance.

这篇关于在整数小数重presentation分离数字的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！