matlab写的计算器，对学习gui有帮助吧

%觉得有很多不足的地方，其中就是点了运算符号之后，就开始做运算了，希望能解决，本人时间没有了。要找工作了 h0=figure('toolbar','none',... 'menu','none',...%设置取消菜单 'color',[0.4,0.8,0.95],... %设置主框架颜色 'position',[403.8 320.923 320 320],... %设置位置和面积大小 'Name',' 广工汉化版计器器——GXUT', ...%设置名字 'NumberTitle','off', 'HandleVisibility', 'on', ...%设置名字是否需要符号 'Visible','on', 'Resize', 'off',... %设置可见性和可收缩性 'Colormap', gray(256));%设置颜色范围 %加号 b11=uicontrol('parent',h0,... 'units','points',... 'tag','b11',... 'style','pushbutton',... 'string','加',... 'fontsize',12,... 'position',[125 15 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'i=i+1;,',... 'if i==1,',... 'm=str2num(k);,',... 'set(e1,''string'',''0'');,',... 'end,',... 'if i>1,',... 'k=get(e1,''string'');,',... 'if g==''+'',',... 'm=m+str2num(k);,',... 'end,',... 'if g==''-'',',... 'm=m-str2num(k);,',... 'end,',... 'if g==''*'',',... 'm=m*str2num(k);,',... 'end,',... 'if g==''/'',',... 'if k==''0'',',... 'errordlg(''除数不能为0'');,',... 'end,',... 'm=m/str2num(k);,',... 'end,',... 'set(e1,''string'',num2str(m));,',... 'i=1;,',... 'end,',... 'k=''0'';,',... 'g=''+'';']); %减号 b12=uicontrol('parent',h0,... 'units','points',... 'tag','b12',... 'style','pushbutton',... 'string','减',... 'fontsize',12,... 'position',[165 105 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'i=i+1;,',... 'if i==1,',... 'm=str2num(k);,',... 'set(e1,''string'',''0'');,',... 'end,',... 'if i>1,',... 'k=get(e1,''string'');,',... 'if g==''+'',',... 'm=m+str2num(k);,',... 'end,',... 'if g==''-'',',... 'm=m-str2num(k);,',... 'end,',... 'if g==''*'',',... 'm=m*str2num(k);,',... 'end,',... 'if g==''/'',',... 'if k==''0'',',... 'errordlg(''除数不能为0'');,',... 'end,',... 'm=m/str2num(k);,',... 'end,',... 'set(e1,''string'',num2str(m));,',... 'i=1;,',... 'end,',... 'k=''0'';,',... 'g=''-'';']); %乘号 b13=uicontrol('parent',h0,... 'units','points',... 'tag','b13',... 'style','pushbutton',... 'string','乘',... 'fontsize',12,... 'position',[165 75 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'i=i+1;,',... 'if i==1,',... 'm=str2num(k);,',... 'set(e1,''string'',''0'');,',... 'end,',... 'if i>1,',... 'k=get(e1,''string'');,',... 'if g==''+'',',... 'm=m+str2num(k);,',... 'end,',... 'if g==''-'',',... 'm=m-str2num(k);,',... 'end,',... 'if g==''*'',',... 'm=m*str2num(k);,',... 'end,',... 'if g==''/'',',... 'if k==''0'',',... 'errordlg(''除数不能为0'');,',... 'end,',... 'm=m/str2num(k);,',... 'end,',... 'set(e1,''string'',num2str(m));,',... 'i=1;,',... 'end,',... 'k=''0'';,',... 'g=''*'';']); %除号 b14=uicontrol('parent',h0,... 'units','points',... 'tag','b14',... 'style','pushbutton',... 'string','除',... 'fontsize',12,... 'position',[165 45 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'i=i+1;,',... 'if i==1,',... 'm=str2num(k);,',... 'set(e1,''string'',''0'');,',... 'end,',... 'if i>1,',... 'k=get(e1,''string'');,',... 'if k==''0'',',... 'errordlg(''除数不能为0'');,',... 'end,',... 'if ~(k==''0''),',... 'if g==''+'',',... 'm=m+str2num(k);,',... 'end,',... 'if g==''-'',',... 'm=m-str2num(k);,',... 'end,',... 'if g==''*'',',... 'm=m*str2num(k);,',... 'end,',... 'if g==''/'',',... 'm=m/str2num(k);,',... 'end,',... 'set(e1,''string'',num2str(m));,',... 'end,',... 'i=1;,',... 'end,',... 'k=''0'';,',... 'g=''/'';']); %等号 b15=uicontrol('parent',h0,... 'units','points',... 'tag','b15',... 'style','pushbutton',... 'string','=',... 'fontsize',12,... 'position',[85 15 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'k=get(e1,''string'');,',... 'if g==''+'',',... 'm=m+str2num(k);,',... 'end,',... 'if g==''-'',',... 'm=m-str2num(k);,',... 'end,',... 'if g==''*'',',... 'm=m*str2num(k);,',... 'end,',... 'if g==''/'',',... 'if k==''0'',',... 'errordlg(''除数不能为0'');,',... 'end,',... 'm=m/str2num(k);,',... 'end,',... 'set(e1,''string'',num2str(m));,',... 'i=0;']); b0=uicontrol('parent',h0,... 'units','points',... 'tag','b0',... 'style','pushbutton',... 'string','0',... 'fontsize',12,... 'position',[45 15 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'if k==''0''&i==0,',... 'errordlg(''数字首位不能为0''),',... 'else,',... 'k=[k,''0''];,',... 'if k==''00'',',... 'k=''0'';,',... 'end,',... 'set(e1,''string'',k);,',... 'end']); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'string','1',... 'fontsize',12,... 'position',[45 45 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'if k==''0'',',... 'k='''';,',... 'end,',... 'k=[k,''1''];,',... 'set(e1,''string'',k);']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'string','2',... 'fontsize',12,... 'position',[85 45 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'if k==''0'',',... 'k='''';,',... 'end,',... 'k=[k,''2''];,',... 'set(e1,''string'',k);']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'style','pushbutton',... 'string','3',... 'fontsize',12,... 'position',[125 45 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'if k==''0'',',... 'k='''';,',... 'end,',... 'k=[k,''3''];,',... 'set(e1,''string'',k);']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'style','pushbutton',... 'string','4',... 'fontsize',12,... 'position',[45 75 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'if k==''0'',',... 'k='''';,',... 'end,',... 'k=[k,''4''];,',... 'set(e1,''string'',k);']); b5=uicontrol('parent',h0,... 'units','points',... 'tag','b5',... 'style','pushbutton',... 'string','5',... 'fontsize',12,... 'position',[85 75 35 20],... 'backgroundcolor',[0.75 0.75 0.75],... 'callback',[... 'if k==''0'',',... 'k='''';,',... 'end,',... 'k=[k,''5''];,',... 'set(e1,''string'',k);']); b6=uicontrol('parent',h0,... 'units','points',... 'tag','b6',... 'style','pushbutton',... 'string','6',... 'fontsize',12,... 'position',[1