数据类型标识显示错误输出MATLAB

Question

我想检查用户输入的值是否为Integer。我尝试使用下面的代码，但它给出了错误的输出。当我输入一个分数值时，它仍然显示"it is an Integer“。

prompt = {'Please Enter the start time:','Increment:','Stop time:'}; %Asking user to enter the data
dlgtitle = 'Input'; %Creating a title for the dialog box
dims = [1 40]; %Adjusting the dimensions
definput = {'0','0.01','10'}; %Using default values to warn users not to put text instead of number
answer = inputdlg(prompt,dlgtitle,dims,definput); %storing the three items of data the user enters
start = str2num(answer{1}); %Converting start value string to number
increment = str2num(answer{2}); %Converting increment value string to number
stop = str2num(answer{3}); %Converting stop value string to number



if start >= stop
    f = msgbox('Start time cannot be greater than end time! Please re-enter!', 'Error!');

elseif increment >= stop
    f = msgbox('The increment cannot be larger than the end time! Please re-enter!', 'Error!');
elseif start <= -1 
    f = msgbox('The start time can only be positive numbers! Please re-enter!', 'Error!' );
elseif stop <= -1 
    f = msgbox('The end time can only be positive numbers! Please re-enter!', 'Error!');
elseif increment <= -1 
    f = msgbox('The increment can only be positive numbers! Please re-enter!', 'Error!');
elseif isempty(str2num(answer{1}))
    f = msgbox('Input must be a number! Please re-enter!', 'Error!');
elseif isempty(str2num(answer{2}))
    f = msgbox('Input must be a number! Please re-enter!', 'Error!');
elseif isempty(str2num(answer{3}))
    f = msgbox('Input must be a number! Please re-enter!', 'Error!');
end 

start=int16(10); %define 'count' as an 8-bit integer 
integer_check=isinteger(start)% is count an integer, 1 if yes, 0 if no 
    if integer_check==1 % if isinteger returns a ‘1’ display message
          disp(' Yes it is an integer')
    else                  % if isinteger returns a ‘0’ display message
            disp(' No it is not an integer')
    end

Answer 1

如果是一个整数，如果除以1则没有余数。因此，用integer_check = isinteger(start)代替

使用

integer_check = rem(start,1) == 0;