Stands for Graphical User Interface and is pronounced "gooey." It is a user interface that includes graphical elements, such as windows, icons and buttons. In this project by using GUI we designed a basic calculator in which general operations can be perform like addition ,subtraction, multiplication etc.

1. Basic Calculator using GUI in MATLAB
Narayan Lal Menariya
ABSTRACT : A Calculator has been created by using
GUI(graphical user interface) which can perform basic
operations like addition , subtraction etc.
GUI is created by using functions and handles for
various pushbuttons and text to display the results and
mathematical operations.
GUI : Stands for Graphical User Interface and is
pronounced "gooey." It is a user interface that includes
graphical elements, such as windows, icons and
buttons.
In this project by using GUI we designed a basic
calculator in which general operations can be perform
like addition ,subtraction, multiplication etc.
ALGORITHM:
 Create a main function calculator
 Define handles for various Pushbutton (1,2,...9,+,-
,*,/ etc) like :
Zero = uicontrol(f,'style','pushbutton','string','0','pos',[20 20 110 50],...
'callback',@PushButton_zero);
Here zero is a handle.
Uicontrol : Create user interface control object.
 Define handle for Text button

2.  Call a function using handles
PROGRAM:
function guide_calculator()
f = figure('color','r','pos',[100 100 600 400]);
Zero = uicontrol(f,'style','pushbutton','string','0','pos',[20 20 110
50],...
'callback',@PushButton_zero);
Dot = uicontrol(f,'style','pushbutton','string','.','pos',[140 20 50
50],...
'callback',@PushButton_dot);
Equal = uicontrol(f,'style','pushbutton','string','=','pos',[200 20 50
110],...
'callback',@PushButton_equal);
One = uicontrol(f,'style','pushbutton','string','1','pos',[20 80 50 50],...
'callback',@PushButton_one);
Two = uicontrol(f,'style','pushbutton','string','2','pos',[80 80 50 50],...
'callback',@PushButton_two);
Three = uicontrol(f,'style','pushbutton','string','3','pos',[140 80 50
50],...
'callback',@PushButton_three);
Four = uicontrol(f,'style','pushbutton','string','4','pos',[20 140 50
50],...
'callback',@PushButton_four);
Five = uicontrol(f,'style','pushbutton','string','5','pos',[80 140 50
50],...
'callback',@PushButton_five);
Six = uicontrol(f,'style','pushbutton','string','6','pos',[140 140 50
50],...
'callback',@PushButton_six);
Multiply = uicontrol(f,'style','pushbutton','string','*','pos',[200 140 50
50],...
'callback',@PushButton_multiply);
Seven = uicontrol(f,'style','pushbutton','string','7','pos',[20 200 50
50],...
'callback',@PushButton_seven);
Eight = uicontrol(f,'style','pushbutton','string','8','pos',[80 200 50
50],...
'callback',@PushButton_eight);
Nine = uicontrol(f,'style','pushbutton','string','9','pos',[140 200 50
50],...
'callback',@PushButton_nine);
Divide = uicontrol(f,'style','pushbutton','string','/','pos',[200 200 50
50],...
'callback',@PushButton_divide);
Removelast = uicontrol(f,'style','pushbutton','string','<--','pos',[20 260
50 50],...
'callback',@PushButton_remove);
ClearAll = uicontrol(f,'style','pushbutton','string','CE','pos',[80 260 50
50],...
'callback',@PushButton_clear);

3. Minus = uicontrol(f,'style','pushbutton','string','-','pos',[140 260 50
50],...
'callback',@PushButton_minus);
Plus = uicontrol(f,'style','pushbutton','string','+','pos',[200 260 50
50],...
'callback',@PushButton_plus);
Text = uicontrol(f,'style','text','pos',[20 320 230 50],...
'callback',@edittext);
function PushButton_zero(Zero,b)
display('0')
q = get(Text,'string');
set(Text,'string',strcat(q,'0'));
end
function PushButton_dot(Dot,b)
display('.')
%set(Text,'string','.')
q = get(Text,'string');
set(Text,'string',strcat(q,'.'));
end
function PushButton_plus(Plus,b)
display('+')
%set(Text,'string','+')
q = get(Text,'string');
set(Text,'string',strcat(q,'+'));
end
function PushButton_one(One,b)
display('1')
%set(Text,'string','1')
q = get(Text,'string');
set(Text,'string',strcat(q,'1'));
end
function PushButton_two(Two,b)
display('2')
%set(Text,'string','2')
q = get(Text,'string');
set(Text,'string',strcat(q,'2'));
end
function PushButton_three(Three,b)
display('3')
%set(Text,'string','3')
q = get(Text,'string');
set(Text,'string',strcat(q,'3'));
end
function PushButton_minus(Minus,b)
display('-')
%set(Text,'string','-')
q = get(Text,'string');
set(Text,'string',strcat(q,'-'));
end

4. function PushButton_four(Four,b)
display('4')
%set(Text,'string','4')
q = get(Text,'string');
set(Text,'string',strcat(q,'4'));
end
function PushButton_five(Five,b)
display('5')
%set(Text,'string','5')
q = get(Text,'string');
set(Text,'string',strcat(q,'5'));
end
function PushButton_six(Six,b)
display('6')
% set(Text,'string','6')
q = get(Text,'string');
set(Text,'string',strcat(q,'6'));
end
function PushButton_multiply(Multiply,b)
display('*')
%set(Text,'string''*')
q = get(Text,'string');
set(Text,'string',strcat(q,'*'));
end
function PushButton_seven(Seven,b)
display('7')
%set(Text,'string','7')
q = get(Text,'string');
set(Text,'string',strcat(q,'7'));
end
function PushButton_eight(Eight,b)
display('8')
%set(Text,'string','8')
q = get(Text,'string');
set(Text,'string',strcat(q,'8'));
end
function PushButton_nine(Nine,b)
display('9')
%set(Text,'string','9')
q = get(Text,'string');
set(Text,'string',strcat(q,'9'));
end
function PushButton_divide(Divide,b)
display('/')
%set(Text,'string','/')
q = get(Text,'string');
set(Text,'string',strcat(q,'/'));
end
function PushButton_clear(ClearAll,b)
set(Text,'string','0');

5. display(0)
end
function PushButton_remove(Removelast,b)
q = get(Text,'string');
q1 = size(q);
set(Text,'string',q(1:q1(2)-1));
end
function PushButton_equal(Equal,b)
a = eval(get(Text,'string'));
display(a)
set(Text,'string',a);
size(a)
end
end
CALCULATOR:

6. CONCLUSION : In this project a basic calculator has been
designed and further it can be modified as a scientific calculator
and other operations can also be added.