Simple Calculator using MATLAB

How to create Simple Calculator using MATLAB - Matlab for beginners

GUI Video is below the code 

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function varargout = mycaltest(varargin)

gui_Singleton = 1;

gui_State = struct('gui_Name',       mfilename, ...

                   'gui_Singleton',  gui_Singleton, ...

                   'gui_OpeningFcn', @mycaltest_OpeningFcn, ...

                   'gui_OutputFcn',  @mycaltest_OutputFcn, ...

                   'gui_LayoutFcn',  [] , ...

                   'gui_Callback',   []);

if nargin && ischar(varargin{1})

    gui_State.gui_Callback = str2func(varargin{1});

end

if nargout

    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});

else

    gui_mainfcn(gui_State, varargin{:});

end

function mycaltest_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = mycaltest_OutputFcn(hObject, eventdata, handles) 

varargout{1} = handles.output;

function four_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'4');

set(handles.ans,'String',str);

function one_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'1');

set(handles.ans,'String',str);

function point_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'.');

set(handles.ans,'String',str);

function seven_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'7');

set(handles.ans,'String',str);

function zero_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'0');

set(handles.ans,'String',str);

function two_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'2');

set(handles.ans,'String',str);

function five_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'5');

set(handles.ans,'String',str);

function eight_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

% it will take the value of ans (ans is our static text

str = strcat(str,'8');

%it will concatinate 8 with the privues string

set(handles.ans,'String',str);

%and it will again set the new value to ans static text 

function equal_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

%it will take the value 

str = eval(str);

%the eval function solve the string or evalutae the string

set(handles.ans1,'String',str);

%after evaluation the ans was 

      %shown in the above static text ans1.

function three_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'3');

set(handles.ans,'String',str);

function six_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'6');

set(handles.ans,'String',str);

function nine_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'9');

set(handles.ans,'String',str);

function div_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'/');

set(handles.ans,'String',str);

function add_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'+');

set(handles.ans,'String',str);

function sub_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'-');

set(handles.ans,'String',str);

function mul_Callback(hObject, eventdata, handles)

str = get(handles.ans,'String');

str = strcat(str,'*');

set(handles.ans,'String',str);

function clear_Callback(hObject, eventdata, handles)

set(handles.ans1,'String','');

set(handles.ans,'String','');

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Upload file from URL to Server using cURL in PHP

This Post show how to upload data or audio files on server getting from URL and how to download that file in PC using URL.

First put URL in string like below:

$url = 'http://s.cdnpk.eu/pk-mp3/love-dose/s165352040.mp3';

To Download file in PC its a simple short-cut.using download attribute of <a> tag in HTML.

echo "<a href='".$url."' download='myfile.wav'>Download</a>";


Now convert that URL to file using curl.

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, false);
$data = curl_exec($curl);
curl_close($curl);

Now create a file on server. And open it in write mode.


  $fileName = "myfile.wav";
  $fh = fopen($fileName, 'w') or die("can't open file");

Write the file which we fetch from URL in 'myfile'. it was in $data variable.

  fwrite($fh, $data);

  fclose($fh);

Close the file that's it. Happy coding. :)

BFS (breadth first search) in BST (binary search tree)

BFS code in red color highlighted.  
1) Insertion in BST
2) Normal Searching in BST.
3) BFS in BST

#include<iostream.h>
#include<conio.h>
class Node{
private:
 int data;
 Node* right;
 Node* left;
public:
 Node(){
  root=NULL;
  right=left=NULL;
 }Node *root;

 void insert(int data){
  Node* newnode = new Node();
  newnode->data = data;
   if (root == NULL){
   root=newnode;
   return;
  }
  Node *p,*q;
  p=q=root;
  while (q!=NULL){
   p=q;
   if (newnode->data> q->data)
    q = q->right;
   else q = q->left;
  }
  if (newnode->data> p->data)
   p->right = newnode;
  else p->left = newnode;
 }


 void inorder(Node *root){
  if (root == NULL) return;
  else {
   cout << root->data <<" ";
   inorder(root->left);
  // cout << root->data <<"  ";
   inorder(root->right);
   }
 }



void search(Node *root,int v)
{
int flag=0;
Node *q=root;
while(v != q->data)
{
if(v < q->data && q->left != NULL)
{
flag=2;
q=q->left;
}
else if( v > q->data && q-right !=NULL)
{
flag=2;
q=q->right;
}else{
flag=1;
cout<<"\n Node value not found . "<<endl;
break;
}
}
if(flag == 0 || flag ==2){
cout<<"\nNode is  found= "<<q->data<<endl;
 }
}

void BFS(Node* root,int value){
 Node **arry=NULL;
 int i=0,j=0;
 arry[i]=root;
 if(root->data == value){
 cout<<root->data<<" ";
 }
 else{           i++;
 while(arry[j]->data != value){
 Node *a=arry[j];
 if(a->left != NULL)
 {
  arry[i]=a->left;i++;
if( a->left->data==value)
{break;}
 }
 if(a->right !=NULL)
{
 arry[i]=a->right;i++;
if(a->right->data==value)
{break;}
 }
   j++;}//end of loop
for(int x=0;x<=(sizeof(arry)/sizeof(*arry));x++){
cout<<arry[x]->data<<" ";
    }//end of for
  }//end of else
}//end of function

};

void main()
{
int c,A[]={8,4,5,1,12,11,13,3,14};
 Node b;
 clrscr();
 for(int i=0;i<=8;i++){
 b.insert(A[i]);
 }

 b.inorder(b.root);
 getch();

cout<<"\n\nEnter Value For Search ";cin>>c;
b.BFS(b.root,c);
getch();

// b.search(b.root,c);
//getch();

// cout<<"\n\nInsert a New Value ";cin>>c;
// b.insert(c);
// b.inorder(b.root);
// getch();

}