Matlab code problems

I have to write a code using functions to find out if a year isa leap year. I'm on the write track i feel like but I keep gettingan error message and matlab isnt helping to troubleshoot. The issueis on line 30. Here is my code:

function project_7_mfp()
%   PROJECT_7_ABC   project_7_abc() creates afunction that prompts the user
%   enter a year after 1582 It then determines if it is aleap year
%
%   Name:
%   Date:
%   Class: CMPSC 200
%

   %   Print the splash screen using aprintHeader() function
  
      
   % Prompt the user for the single data input for theprogram. This
   %   is the year. You will need to write alocal function called getDataRange().
   %   Then call it here. The function willreturn a single input. The
   %   getDataRange function must error checkthe input to be sure that is at
   %   least 1582 when the Gregorian calendaywas enacted.
  
   global debug
debug = 0;
  
   getDataRange('Enter the year: ', 1582, inf);
if(debug)
   fprintf('You entered %f\n', year);

end
  
%   Call isLeapYear(year) to check if the year is a leapyear.
  
   isLeapYear(year);
   %   Use printResults to print if the year isa leap year or not
printResults(year, leap)


end

function getDataRange(prompt, a, b)
%   GETDATARANGE   getDataRange(prompt, a, b)is a wrapper function to enter
%   and error check that input. prompt is a variablestoring the prompt to be
%   printed. a and b are the minimum and maximum valuesfor the error checking
%
%   Name:      
%   Class:       CMPSC 200
%   Date:      
%
  
global debug

   year = input(prompt);
  
assignin('base','year',year)
if(debug)
fprintf('Calling the selection to check if the value is withinrange\n');
end
%error check
  
if ((year < a) || (year > b))
  
if(debug)
fprintf('The value is out of range so throw an exception andexit\n');
end
  
error('Entered value, %f, is outside of the range of %f to %f',year, a, b);
end
  
if (mod(year,1) ~=0)

   error('Entered value, %f, is not an integer',year);
end
  
end

function leap = isLeapYear(year)
%   ISLEAPYEAR   isLeapYear(year) checks theinput to determine if it is a leap
%   year. If it is, the function returns 1. If it is notit returns 0
%
%   Name:      
%   Class:       CMPSC 200
%   Date:      
%
  
%failure

assignin('base','year',year)
   if (mod(year,400)==0)
leap = 1;

elseif (mod(year,100)==0)
leap = 0;
elseif (mod(year,4)==0)
leap = 1;
else
leap = 1;
  
end
  
  
  
  
end

function printResults(year, leap)
%   PRINTRESULTS   printResults(year, leap)prints a statement indicating
%   if the year is a leap year or if it is not.
%
%   Name:      
%   Class:       CMPSC 200
%   Date:      
%
   if leap == 1
fprintf('%f is a leap year', year);
elseif leap == 0
fprintf('%f is not a leap year', year);
end
  
  
  
  
  
  
end