Below is the question and together with it is my code... but there is always error at the fscanf function.. Can anyone help me pls??

Write a script, which first asks the user to input an integer number between 0 and 255, then

outputs the number to the screen between the characters '<' and '>', and calls a user function

‘mcheck’(as described below)to check the number entered. The input, display and check operation

should be repeated for 10 times. After the 10th iteration, the script should save all the input

numbers to a text file in a human readable format.

The user function ‘mcheck’ mentioned above will do the following check for each number entered:

if the number is in the range of 0 to 255, no change is needed; if the number entered is bigger

than 255, the script should print a message “error: The value too big.” to the screen, but make no

change to the value of the number; if a negative number is entered, no matter what is the exact

number, the script should convert it to -1.

Here's my code:

function mcheck(a)

file=[]

for n=1:10

a= input("Enter Value Between 0 To 255:")

if a<0

a=-1

elseif a>255

disp('error, the value is too big')

else

a=string(a)

file_id=fopen('file','w')

fprintf(file_id,'%s',a)

fclose(file_id)

end

end

file_id=fopen('file','r')

text=fscanf('file','%s',a)

disp(text)

fclose('file')

end

[Stephen23]

Duplicate: https://www.mathworks.com/matlabcentral/answers/1875667-i-don-t-know-how-to-make-it-repeat-10-times-and-save-all-input-numbers-into-text-file-in-a-human-rea

Answer 1

[VBBV]

text=fscanf(file_id,'%s',a)

[VBBV]

Give file id instead of file

[VBBV]

fclose(file_id)

Answer 2

[Jan]

The problem is hidden here:

file_id=fopen('file','r')
text=fscanf('file','%s',a)
%           ^^^^^^      ^ ???

fscanf expects the file identifier stored in file_id, not the CHAR vector 'file'.

What is the purpose of the trailing argument a? Omit it.