Output shows an 'ans=', I don't know where did i go wrong

5 次查看（过去 30 天）
Jan Kyle Dismas
Jan Kyle Dismas 2021-2-12
回答： Steven Lord 2021-2-12
So i have a program about calculating the current age of the user, my code is much similar to https://www.mathworks.com/matlabcentral/fileexchange/43764-age_calculator, i only copied the process of calculation, and no gui.
So everytime i run my code, it keeps showing the "ans=" at the end and i dont know where i did wrong, can u help me out?
here is my code
function [day,month,year,YY,MM,DD,message]=bday_calc(~,~,~,~,~)
%The program will ask question to the user about his Birth date,month and
%year
disp ('What day did you born? ');
day= (' ');
BdayDate= input (day);
%if the user typed value above 31, the program will give an error
if BdayDate > 31
disp('This is not a valid answer, Run the program again!');
return
end
if isempty(BdayDate)
disp('This is not a valid answer, Run the program again!');
return
end
disp ('What month did you born?');
disp ('In numerical value e.g (1=January) ');
month= ('');
BdayMonth= input (month);
%if the user typed value above 12, the program will give an error
while BdayMonth > 12
disp('This is not a valid answer, Run the program again!');
return
end
%For the Year, using the clock command allows to get the current day and converts it
%into vectors.
Time = clock;
DateToday = round([Time(3) Time(2) Time(1)]);
disp ('What year did you born');
year= ('');
Year= input (year);
%When the user input a year ahead from the current year, the program will
%give an error
if Year > DateToday (3)
disp('This is not a valid answer, Run the program again!');
return
end
if Year < 1000
disp('Please input valid year');
return
end
%This part calculates the age of the user
DateOfBirth=[BdayDate,BdayMonth,Year];
YY = DateToday(3) - DateOfBirth(3);
MM = DateToday(2) - DateOfBirth(2);
DD = DateToday(1) - DateOfBirth(1);
if DD < 0
DD = DD+30;
MM = MM-1;
end
if YY < 100
YY=YY+2000;
end
if MM < 0
MM = MM+12;
YY =YY-1;
end
if MM<12
end
Age = [YY,MM,DD];
%Pop-up message
message = ['Your Age Is ' num2str(Age(1)) ' Year(s) ' num2str(Age(2)) ' Month(s) ' num2str(Age(3)) ' day(s) '];
disp (message)
end
this is the result

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采纳的回答

Alberto Mora
Alberto Mora 2021-2-12
编辑：Alberto Mora 2021-2-12
Suppress output the function when you call it, like follow:
bday_calc; % add the ; symbol
  2 个评论
Alberto Mora
Alberto Mora 2021-2-12
编辑：Alberto Mora 2021-2-12
Next time, please use a better title that describe the problem for your question: don't use a generic "help me".
Moreover, it the answer helps you, please accept it as sign of gratitude. In this way other users with similar problem can find easily the solution.
Jan Kyle Dismas
Jan Kyle Dismas 2021-2-12
Oh im very sorry about the title, im very new and i dont know everything yet. but thank you for your answer, i just put the bday_calc; at the end of my program and it works well

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更多回答（1 个）

Steven Lord
Steven Lord 2021-2-12
Your function is defined to return up to seven output arguments.
function [day,month,year,YY,MM,DD,message]=bday_calc(~,~,~,~,~)
When you call it with zero output arguments and ask MATLAB to display the output (by not ending the line with a semicolon) MATLAB will by default assign the value of the first output to the variable named ans (for ANSwer) and then display ans.
Alberto Mora's answer suppresses the display by ending the call with a semicolon. You could also, if you want to work with some or all of those outputs later in your session, call bday_calc with between one and seven output arguments.
[thisIsTheDay, thisIsTheMonth] = bday_calc
The year, YY, MM, DD, and message outputs will be ignored in this call since you didn't ask for them.

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