How to use prompts with User Defined Functions

Question

Jason Ramirez 2020-3-6

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/509477-how-to-use-prompts-with-user-defined-functions

回答： Sahithi Metpalli 2020-3-9

Help!

So I have been trying to create a user defined function with a prompt as an input so I can data validate a multitude of variables with changing input prompts.

I need it to be silimar to an input function that has one output and one input.

function [Out] = ValidInput('Prompt')
% In is the variable name i want the prompt to have but have no clue to get a value from the prompt.
    c = 0;
    while In <= 0 & c < 3
        % somehow ask again with the same prompt
        c = c+1;
    end
    if In == 0
        error('Entered value is zero. Cannot solve problem, program terminated.')
    elseif In < 0
        warning('Invalid value entered 3 times. Taking the absolute value of the entered value.')
        Out = abs(In);
    end
end

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Ameer Hamza 2020-3-6

Can you give an example of how you will call this function, and what will be the expected output after running this function?

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Answer 1

Sahithi Metpalli 2020-3-9

0
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Hi,

Follow the below code

function [Out] = ValidInput(Prompt) 
% In is the variable name i want the prompt to have but have no clue to get a value from the prompt. 
In = input(Prompt) 
    c = 0; 
    while In <= 0 & c < 3 
        % somehow ask again with the same prompt 
        In = input(Prompt) 
        c = c+1; 
        disp(c); 
    end 
    if In == 0 
        error('Entered value is zero. Cannot solve problem, program terminated.') 
    elseif In < 0 
        warning('Invalid value entered 3 times. Taking the absolute value of the entered value.') 
        Out = abs(In); 
    else 
        %assigning In  to output 
        Out = In; 
    end 
end 