Skill Enhancement Courses (SEC) - c language

                                                       Question Set - 1
1. What is high level language?
2. Comparison of high level language and machine level language.
3. What do you mean by compiler?
4. Advantages and disadvantages of flowchart.
5. Advantages and disadvantages of algorithm.
6. Size of datatype- int,char,float.
7. Difference between prefix++ and postfix ++.
8. Example of logical operator and bitwise operator.
9. Difference between while loop and do-while loop.
10. Difference between while loop and for loop.
11. Difference between break and continue.
12. Difference between variable declaration and variable definition.
13. What do you mean by subscripted variable.
14. What do you mean by dynamic memory alloaction?
15. Write a c program to swap two values using 3rd variable.
16. Write a c program to swap two values without using 3rd variable.
17. Write a c program to find n!.
18. Write a c program to compute nCr, nPr.
19. Write a c program to largest and smallest number from a set of n numbers using array.
20. Write a c program to sort n numbers in ascending order.
21. Write a c program to sort n numbers in descending order.
22. Write a c program to perform addition,subtraction, multiplication of matrices.

array insertion deletion using c++

                                                                                                   edited by:: Subhrajit Gorai
                                                                                                                      CMSA 1st sem


source code::

#include<iostream>

#include<conio.h>

using namespace std;

class Array{

                int arr[100],l,e,n;

                public:  

                                void input(){

                                cout<<"Enter the length of the array :";

                                cin>>l;  

                                cout<<"Enter the elements of the array :\n";

                                for(int i=0;i<l;i++)

                                cin>>arr[i];

                                }

                               

                                void output(){

                                cout<<"\nThe elements of the array :\n";

                                for(int i=0;i<l;i++)

                                                cout<<arr[i]<<" , ";

                }

                                               

                void insert_At_Begin(){

                                                cout<<"\nEnter the elements to be inserted in the array :\n";

                                                cin>>e;

                                                l++;

                                                for(int i=l-2;i>=0;i--){

                                                                arr[i+1]=arr[i];

                                                }

                                                arr[0]=e;

                                                output();

                                }

               

                void del_At_Begin(){

                                l--;

                                for(int i=0;i<l;i++)

                                                arr[i]=arr[i+1];

                                                output();

                                }

               

                void insert_At_End(){

                                cout<<"\nEnter the elements to be inserted in the array :\n";

                                cin>>e;

                                l++;

                                arr[l-1]=e;

                                output();

                }

               

                void del_At_End(){

                                                l--;

                                                output();

                }

               

                void insert_At_Index(){

                                                cout<<"Enter the position of the array where the element is to be inserted :";

                                                cin>>n;

                                                while(n>l||n<0){

                                                cout<<"\nINVALID POSITION entered........!!!!";

                                                cout<<"\nEnter the position of the array where the element is to be AGAIN :";

                                                cin>>n;

                                                }

                                                cout<<"\nEnter the elements to be inserted in the array :\n";

                                                cin>>e;

                                                l++;

                                                --n;

                                                for(int i=l-2;i>=n;i--){

                                                                arr[i+1]=arr[i];

                                                }

                                                arr[n]=e;

                                                output();

                                }

               

               

                void del_At_Index(){

                                cout<<"\nEnter the position of the array where the element is to be Deleted :";

                                cin>>n;

                                while(n>l||n<0){

                                                cout<<"\nINVALID POSITION entered........!!!!";

                                                cout<<"\nEnter the position of the array where the element is to be AGAIN :";

                                                cin>>n;

                                }

                                n=n-1;

                                                for(int i=n;i<l;i++)

                                                                arr[i]=arr[i+1];

                                l--;

                                output();

                }

               

                void cho(){

                                int c;

                                cout<<"\n\n  1. Insert Element at the Begining.\n  2. Insert Element at the End.\n  3. Insert Element at any desired position.\n  4. Delete Element at the Begining.\n  5. Delete Element at the End.\n  6. Delete Element at any desired position.\n  7. Exit\n";

                                cout<<"\nEnter the choice:";

                                                cin>>c;

                                                switch (c)

                                                {

                                                case 1:

                                                                insert_At_Begin();

                                                                 break; 

                                                case 2:

                                                                insert_At_End();

                                                                 break; 

                                                case 3:

                                                                insert_At_Index();

                                                                 break; 

                                                case 4:

                                                                del_At_Begin();

                                                                 break; 

                                                case 5: 

                                                                del_At_End();

                                                                   break;                               

                                                case 6:

                                                                del_At_Index();

                                                                 break; 

                                                case 7: exit(0);                  

                                                default :cout<<" Wrong Choice!!!!\n Enter the choice Again.... ";

                                                                                 cho();

                                                }

                }

};

                int main(){

                                int s=0;

                                Array ob;

                                ob.input();

                                ob.output();

                                for(int k=0;;k++)

                                ob.cho();

                                getch();

                                return 0;

}                                             

output::

basic operator in vb6

Private Sub Form_Load()
Dim a, b, c, d, e, f As Integer
a = 5
b = 4
c = a + b

d = a - b

e = a * b

f = a / b

MsgBox ("sum=" & c & vbCrLf & "differnce=" & d & vbCrLf & "multiplication=" & e & vbCrLf & "division=" & f)


End Sub


output

synchronization

class PrintTable{ 
//synchronized method.
    public synchronized void printTable(int n){
       System.out.println("Table of " + n);
       for(int i=1;i<=10;i++){
           System.out.println(n*i);
           try{
        Thread.sleep(500);
           }catch(Exception e){
        System.out.println(e);
           }
        }     
    }
}

class MyThread1 extends Thread{
    PrintTable pt;
    MyThread1(PrintTable pt){
    this.pt=pt;
    }
    public void run(){
    pt.printTable(2);
    }     
}

class MyThread2 extends Thread{
PrintTable pt;
MyThread2(PrintTable pt){
this.pt=pt;
}
public void run(){
pt.printTable(5);
}
}

public class p1{
    public static void main(String args[]){
    //creating PrintTable object.
    PrintTable obj = new PrintTable();

    //creating threads.
    MyThread1 t1=new MyThread1(obj);
    MyThread2 t2=new MyThread2(obj);

    //start threads.
    t1.start();
    t2.start();
    }
}



C:\Users\Com science\Documents>java p1
Table of 2
2
4
6
8
10
12
14
16
18
20
Table of 5
5
10
15
20
25
30
35
40
45
50

C:\Users\Com science\Documents>

with out synchronization

class PrintTable{   
    public void printTable(int n){
      // synchronized(this){
       System.out.println("Table of " + n);
           for(int i=1;i<=10;i++){
               System.out.println(n*i); 
               try{ 
            Thread.sleep(500); 
               }catch(Exception e){
            System.out.println(e);
               } 
            }
       //}           
    } 
} 

class MyThread1 extends Thread{ 
    PrintTable pt; 
    MyThread1(PrintTable pt){ 
    this.pt=pt; 
    } 
    public void run(){
    pt.printTable(2); 
    }       
} 

class MyThread2 extends Thread{ 
PrintTable pt; 
MyThread2(PrintTable pt){ 
this.pt=pt; 
} 
public void run(){ 
pt.printTable(5); 
} 
} 

public class p1{ 
    public static void main(String args[]){
    //creating PrintTable object.
    PrintTable obj = new PrintTable(); 

    //creating threads.
    MyThread1 t1=new MyThread1(obj); 
    MyThread2 t2=new MyThread2(obj); 

    //start threads.
    t1.start(); 
    t2.start(); 
    } 
}



C:\Users\Com science\Documents>java p1
Table of 5
5
Table of 2
2
4
10
6
15
20
8
10
25
12
30
35
14
16
40
45
18
50
20

C:\Users\Com science\Documents>

synchronization

class PrintTable{   
    public void printTable(int n){
       synchronized(this){
       System.out.println("Table of " + n);
           for(int i=1;i<=10;i++){
               System.out.println(n*i); 
               try{ 
            Thread.sleep(500); 
               }catch(Exception e){
            System.out.println(e);
               } 
            }
       }           
    } 
} 

class MyThread1 extends Thread{ 
    PrintTable pt; 
    MyThread1(PrintTable pt){ 
    this.pt=pt; 
    } 
    public void run(){
    pt.printTable(2); 
    }       
} 

class MyThread2 extends Thread{ 
PrintTable pt; 
MyThread2(PrintTable pt){ 
this.pt=pt; 
} 
public void run(){ 
pt.printTable(5); 
} 
} 

public class p1{ 
    public static void main(String args[]){
    //creating PrintTable object.
    PrintTable obj = new PrintTable(); 

    //creating threads.
    MyThread1 t1=new MyThread1(obj); 
    MyThread2 t2=new MyThread2(obj); 

    //start threads.
    t1.start(); 
    t2.start(); 
    } 
}



C:\Users\Com science\Documents>java p1
Table of 2
2
4
6
8
10
12
14
16
18
20
Table of 5
5
10
15
20
25
30
35
40
45
50

C:\Users\Com science\Documents>

nested try

import java.util.*;
public class p1 {
    public static void main(String[] args) {
        try {
            System.out.println("Outer try block starts");
            try {
                System.out.println("Inner try block starts");
                int res = 5 / 0;
            } catch (InputMismatchException e) {
          System.out.println("InputMismatchException caught");
            } finally {
                System.out.println("Inner final");
            }
        } catch (ArithmeticException e) {
            System.out.println("ArithmeticException caught");
        } finally {
            System.out.println("Outer finally");
        }
    }
}






C:\Users\Com science\Documents>java p1
Outer try block starts
Inner try block starts
Inner final
ArithmeticException caught
Outer finally

C:\Users\Com science\Documents>

text box and command button

import java.awt.*;
import java.awt.event.*;
class p1 extends Frame implements ActionListener{
TextField tf;
p1(){

tf=new TextField();
tf.setBounds(60,50,170,20);
Button b=new Button("click me");
b.setBounds(100,120,80,30);


b.addActionListener(this);


add(b);add(tf);
setSize(300,300);
setLayout(null);
setVisible(true);
}
public void actionPerformed(ActionEvent e){
tf.setText("Welcome");
}
public static void main(String args[]){
new p1();
}
}

event handling

 1. text box & command button -- LINK
 2. BASIC INTRODUCTION LINK LINK2

3. keyboard  handling -- link
4. mouse handling -- link

keyboard handling

1.
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code="Key" width=300 height=400>
</applet>
*/
public class Key extends Applet
implements KeyListener
{
int X=20,Y=30;
String msg="KeyEvents--->";
public void init()
{
addKeyListener(this);
requestFocus();
setBackground(Color.green);
setForeground(Color.blue);
}
public void keyPressed(KeyEvent k)
{
showStatus("KeyDown");
int key=k.getKeyCode();
switch(key)
{
case KeyEvent.VK_UP:
showStatus("Move to Up");
break;
case KeyEvent.VK_DOWN:
showStatus("Move to Down");
break;
case KeyEvent.VK_LEFT:
showStatus("Move to Left");
break;
case KeyEvent.VK_RIGHT:
showStatus("Move to Right");
break;
}
repaint();
}
public void keyReleased(KeyEvent k)
{
showStatus("Key Up");
}
public void keyTyped(KeyEvent k)
{
msg+=k.getKeyChar();
repaint();
}
public void paint(Graphics g)
{
g.drawString(msg,X,Y);
}
}

<applet code="Key" width=200 height=60>

</applet>

Example2:


import java.awt.*;

import java.applet.*;



public class Key1 extends Applet

{

    int keyPressed;



    public void init()

    {

        keyPressed = -1;



        Font font =  new Font("TimesRoman", Font.BOLD, 144);

        setFont(font);



        resize(200, 200);

    }



    public void paint(Graphics g)

    {

        String str = "";



        if (keyPressed != -1)

        {

            str += (char)keyPressed;

            g.drawString(str, 40, 150);

        }

    }



    public boolean keyDown(Event evt, int key)

    {

        keyPressed = key;

        repaint();

        return true;

    }

}

<applet code="Key1" width=200 height=60>
</applet>