How can I get a user to input a number which is not already

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Pheamwat
Pheamwat 2023-4-22
回答： Rik 2023-4-22
Hi, I just want a user to input(input must be between 1-9) a new number, so store the input value in a vector and add every new input to that vector and every time the user input new number I just use a code to check is the input is already in the vector, but my code is not check every value in the vector.
o=[];
for i=1:4
num=input('Enter:');
while num<=0||num>=9
num=input('Enter exist number:');
end
for i=1:length(o)
if num==o(i)
while num==o(i)
num=input('Enter new:');
end
end
end
o=[o num];
end
This is my code, can anyone please help
Thanks,

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采纳的回答

Rik
Rik 2023-4-22
What you need to do, is to put your input statement at the start of the while loop, and then you can use ismember instead of a loop to check for matches.
Note that you should ask the user for the number in a char vector, and then use str2double to convert the char to a number.
The bottom line is that you should split the tasks of asking the user for a number and validating that input. You should write it in such a way that you can put those things in separate functions.

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