h1=uicontrol(gcf,'style','radio',...
    'string','加',...
    'value',1,...
    'position',[20 150 40 20],...
    'callback',[...
        'k=1;,',...
        'set(h1,''value'',1),',...
        'set(h2,''value'',0),',...
        'set(h3,''value'',0)']);
h2=uicontrol(gcf,'style','radio',...
    'string','減',...
    'position',[20 110 40 20],...
    'callback',[...
        'k=2;,',...
        'set(h2,''value'',1),',...
        'set(h1,''value'',0),',...
        'set(h3,''value'',0)']);
h3=uicontrol(gcf,'style','radio',...
    'string','乘',...
    'position',[20 70 40 20],...
    'callback',[...
        'k=3;,',...
        'set(h3,''value'',1),',...
        'set(h2,''value'',0),',...
        'set(h1,''value'',0)']);
e1=uicontrol(gcf,'style','edit',...
    'position',[80 150 100 20]);
e2=uicontrol(gcf,'style','edit',...
    'position',[80 110 100 20]);
e3=uicontrol(gcf,'style','edit',...
    'position',[80 70 100 20]);
b1=uicontrol(gcf,'style','pushbutton',...
    'string','運算',...
    'position',[200 150 80 30],...
    'callback',[...
        'x=str2num(get(e1,''string''));,',...
        'y=str2num(get(e2,''string''));,',...
        'switch k,',...
        'case 1,',...
        'z=x+y;,',...
        'case 2,',...
        'z=x-y;,',...
        'case 3,',...
        'z=x*y;,',...
        'end,',...
        'set(e3,''string'',num2str(z))']);
b2=uicontrol(gcf,'style','pushbutton',...
    'string','退出',...
    'position',[200 100 80 30],...
    'callback','close');