Need help with error checking
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Hello,
I'm trying to get my error handling code (conditions) to work for my code. Basically, what I'm trying to do is when a user to be greeted with an error message if enter a number other than 1 or 2, or if they enter a letter (a non numerical value).
disp('For the following questions, press 1 for yes and 2 for no')
check1 = input (' Does your projectile departure and landing zone share a similar height?: ');
check2 = input (' are you trying to clear a wall?: ');
check3 = input (' Is there an initial velocity?: ') ;
while check1(isnan) || check1~=1 && check1~=2
check1(isnan)
disp ('Error! Input a number (either 1 or 2')
elseif check1~=1 && check1~=2
disp('Error! Only input 1 for yes and 2 for no')
end
end
回答（1 个）
James Tursa
2021-1-18
There are various ways to code this, but keeping the same basic architecture you have chosen you could do this:
while( true )
disp('For the following questions, press 1 for yes and 2 for no')
check1 = input (' Does your projectile departure and landing zone share a similar height?: ');
check2 = input (' are you trying to clear a wall?: ');
check3 = input (' Is there an initial velocity?: ') ;
if( (isequal(check1,1) || isequal(check1,2)) && ...
(isequal(check2,1) || isequal(check2,2)) && ...
(isequal(check3,1) || isequal(check3,2)) )
break;
end
disp('Error! Only input 1 for yes and 2 for no')
end
This will run in a loop until the checks pass.
2 个评论
Farouk Omer
2021-1-18
James Tursa
2021-1-18
编辑：James Tursa
2021-1-18
My suggestion uses only the while and if controls. This seems to match your requirements.
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