我该如何输入包含数字和字符数据的行？ [英] How should I input a line with numeric and character data in it?

问题描述

12345+67890

如何输入此行？



< b>我尝试了什么：



我不知道任何关于这个...

How to input this line?

What I have tried:

I DON'T KNOW ANYTHING REGAARDING THIS..

推荐答案

读取它作为一个字符串，然后 - 假设它不会总是在中间有一个+ - 将它处理成一个字符串集合：一个数字序列变成一个字符串，一个非数字序列变为另外。

在这种情况下，你最终会得到三个字符串：

Read it as a string, then - assuming it won't always have a "+" in the middle - process it into a collection of strings: a sequence of numerics becomes a string, a sequence of non-numerics becomes another.
In this case you will end up with three strings:

"12345"
"+"
"67890"

然后您可以将数字转换为数字，并使用开关语句计算表达式。



如果你逐步做到这一点并不困难 - 但这是你的功课，不是我的，所以我不会给你任何代码！

坐下来思考几分钟 - 它真的不像你想象的那么复杂。

You can then convert the numerics to numbers, and work out the expression using a switch statement.

It's not difficult if you do it stage by stage - but this is your homework, not mine, so I'll give you no code!
Sit down and think about it for a few minutes - it's really not as complicated as you seem to think.

为了你的功课，你需要向他们学习 C ++教程。



特别是你需要学习std的usful功能::字符串，如拆分和添加字符。

For your homework you need to learn from some C++ tutorial.

Especially you need to learn the usful functions of std::string like spliting and adding characters.

Quote：

如何输入这一行？

与其他任意字符串完全一样，输入为字符串。

处理完字符串后得到你想要的结果。

Exactly like any other arbitrary string of chars, input as a string.
And after you process the string to get the result you want.

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