How can i collect number without using eval function ?
显示 更早的评论
I try to use int2str and num2str which didnot compute the problem. However, it computed ans = 51 43 50 If I give 3+2, it should compute 5 and show the screen which one can be defined ? What is something? Like example:
Number=input('Enter Number please:','s')
result=something(Number)
4 个评论
Stephen23
2016-5-2
@ahmet ozdemir: can you please give exact input examples, and what you want the output to be. Do you want the user to be able to input any arbitrary equation and get the evaluated result, or do you want them to input numeric values?
ahmet ozdemir
2016-5-2
CS Researcher
2016-5-2
@ahmet ozdemir: Did you see my recent solution? It does what you are asking for.
ahmet ozdemir
2016-5-2
采纳的回答
CS Researcher
2016-5-2
编辑：CS Researcher
2016-5-2
You can try something like this:
in = input('Please enter a number:','s');
s = strsplit(in,'+');
result = sum(str2double(s));
3 个评论
ahmet ozdemir
2016-5-2
编辑：ahmet ozdemir
2016-5-2
CS Researcher
2016-5-2
编辑：CS Researcher
2016-5-2
If it works you should accept my solution. You can update it to work for any operation. I will give you the solution to a basic 2 input problem:
in = input('Please enter a number:','s');
s = strsplit(in,'-');
result = -1*diff(str2double(s));
This will however only work for a basic subtraction. You should take it forward and modify it according to your need.
ahmet ozdemir
2016-5-2
更多回答（2 个）
The safest and most versatile:
num = str2double(input('Please enter a number:','s'));
CS Researcher
2016-5-2
You mean something like this:
Number=input('Enter Number please:','s');
eval(['result = ' Number])
3 个评论
ahmet ozdemir
2016-5-2
Stephen23
2016-5-2
1) the title states clearly "without using eval function"
2) eval should be avoided for many reasons. In this case it could be a security risk because it executes arbitrary code from the end user.
CS Researcher
2016-5-2
Oh I am sorry. I misread the title.
类别
在 帮助中心 和 File Exchange 中查找有关 Startup and Shutdown 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
