Smart Calculator:

/**
* author Akhilesh Dhar Dubey
**/

#include<stdio.h>
#include<conio.h>
#include<STDLIB.H>
#include<STRING.H>
main(){
int operand1,operand2,i,j,count,calc,flag,ans,more_opr;
char x[20],opr,y[10],z[10];
do{
operand1=0;
operand2=0;
i=0;
j=0;
count=0;
calc=0;
flag=1;
ans=0;
fflush(stdin);
// clrscr();
printf("Enter:\n");
scanf("%[^\n]s",&x);
fflush(stdin);
// more_opr=0;

for(i=0;x[i]!='\0';){

for(j=0;x[i] =='0' || x[i] =='1' || x[i] =='2' || x[i] =='3' || x[i] =='4' || x[i] =='5' || x[i] =='6' || x[i] =='7' || x[i] =='8' || x[i] =='9';i++,j++){
strcpy((y+j),(x+i));//y[j]=x[i];
}
// strcpy(y,x); //we can write this also bcoz x contain value before any opr accur.
//printf("\t\t\t %d \t\t\t\n",atoi(y));
operand1=atoi(y);
printf("operand1 = %d\t",operand1);

if(x[i] =='+'){
opr=x[i];
i++;
more_opr++;
}
else if(x[i] =='-'){
opr=x[i];
i++;
more_opr++;
}
else if(x[i] =='*'){
opr=x[i];
i++;
more_opr++;
}
else if(x[i] =='/'){
opr=x[i];
i++;
more_opr++;
}

/* if(more_opr >=2){
printf("wrong operation performed...");
break;
}
*/
for(j=0;x[i] =='0' || x[i] =='1' || x[i] =='2' || x[i] =='3' || x[i] =='4' || x[i] =='5' || x[i] =='6' || x[i] =='7' || x[i] =='8' || x[i] =='9';i++,j++){
strcpy((z+j),(x+i));
}
//printf("\t\t\t %d \t\t\t\n",atoi(z));
operand2=atoi(z);
printf("operand2 = %d\t",operand2);

if(opr =='+'){
if(flag){
calc=operand1+operand2;
flag=0;
}
else
calc+=operand2;
printf("opr = %c\n",opr);
}
else if(opr =='-'){
if(flag){
calc=operand1-operand2;
flag=0;
}
else
calc-=operand2;
printf("opr = %c\n",opr);
}
else if(opr =='*'){
if(flag){
calc=operand1*operand2;
flag=0;
}
else
calc*=operand2;
printf("opr = %c\n",opr);
}
else if(opr =='/'){
if(flag){
calc=operand1/operand2;
flag=0;
}
else
calc/=operand2;
printf("opr = %c\n",opr);
}
}
printf("\ncalc = %d",calc);

printf("\n\nDo you want to calculate more:(1/0)");
scanf("%d",&ans);
}while(ans==1);
}

Moving Eyes:

import java.awt.*;

import java.applet.*;

/*

<applet code="MovingFace" width=300 height=50>

</applet>

 */

public class MovingFace extends Applet implements Runnable {

    Thread t = null;

    int state, i = 0;

    int X = 0, Y = 0;

    int UserX = 102, UserY = 102;

    boolean stopFlag;

// Set colors and initialize thread.

    public void init() {

        setBackground(Color.gray);

        setForeground(Color.red);

    }

// Start thread

    public void start() {

        X = Integer.parseInt(getParameter("Xcord"));

        Y = Integer.parseInt(getParameter("Ycord"));

        t = new Thread(this, "eyeThread");

        stopFlag = false;

        t.start();

    }

// Entry point for the thread that runs the banner.

    public void run() {

        for (;;) {

            try {

                for (i = 0; i < 20; i += 2) {

                    repaint();

                    Thread.sleep(200);

                }

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

                    repaint();

                    Thread.sleep(200);

                }

                if (stopFlag) {

                    break;

                }

            } catch (InterruptedException e) {

            }

        }

    }

// Pause the banner.

    public void stop() {

        stopFlag = false;

        t = null;

    }

// Display the banner.

    public void paint(Graphics g) {

        g.setColor(Color.orange);

        g.fillOval(X + 0, Y + 0, 100, 100); //face

        g.setColor(Color.black);

        g.fillOval(X + 15 + i, Y + 30, 10, 10); //moving eyes

        g.fillOval(X + 55 + i, Y + 30, 10, 10); //moving eyes

        g.drawOval(X + 15, Y + 20, 30, 20); //eye left

        g.drawOval(X + 55, Y + 20, 30, 20); //eye right

        g.setColor(Color.blue);

        int xpoints[] = {X + 40, X + 60, X + 50}; // for nose

        int ypoints[] = {Y + 65, Y + 65, Y + 40};

        int num = 3;

        g.fillPolygon(xpoints, ypoints, num); // end nose

        g.setColor(Color.red);

        g.fillOval(X + 32, Y + 75, 35, 8); //mouth

        int xpoints1[] = {1, UserX - 1, UserX - 1, 1};

        int ypoints1[] = {1, 1, UserY - 1, UserY - 1};

        int num1 = 4;

        g.drawPolygon(xpoints1, ypoints1, num1);

        int xpoints2[] = {2, UserX - 2, UserX - 2, 2};

        int ypoints2[] = {2, 2, UserY - 2, UserY - 2};

        int num2 = 4;

        g.drawPolygon(xpoints2, ypoints2, num2);

    }

}

JAVA fall:

import java.awt.*;

import java.applet.*;

/*

<applet code="JavaFall" width=300 height=50>

</applet>

 */

public class JavaFall extends Applet implements Runnable {

    Thread t = null;

    String msg1, msg2, msg3, msg4;

    char ch;

    int UserX = 100, UserY = 250;

    int i = 0, j = 0, k = 0, k1 = 0, k2 = 0, k3 = 0, k4 = 0, count = 0;

    boolean stopFlag;

// Set colors and initialize thread.

    public void init() {

        msg1 = "J";

        msg2 = "A";

        msg3 = "V";

        msg4 = "A";

        setBackground(Color.gray);

        setForeground(Color.red);

        setFont(new Font("serif", Font.BOLD, 30));

    }

// Start thread

    public void start() {

        t = new Thread(this, "eyeThread");

        stopFlag = false;

        t.start();

    }

// Entry point for the thread that runs the banner.

    public void run() {

        /* for( ; ; )

        { */

        try {

            for (i = 0; i < 4; i++) {

                j += 50;

                for (; k < 100; k += 10) {

                    Thread.sleep(2000);

                    repaint();

                    count++;

                    if (stopFlag) {

                        break;

                    }

                    if (count == 1) {

                        k1 = 100;

                    }

                    if (count == 2) {

                        k2 = 100;

                    }

                    if (count == 3) {

                        k3 = 100;

                    }

                    if (count == 4) {

                        k4 = 100;

                    }

                /* repaint();

                Thread.sleep(200);

                k1=0;k2=0;k3=0;k4=0;

                 */

                }

            }

        } catch (InterruptedException e) {

        }

    /* }*/

    }

// Pause the banner.

    public void stop() {

        stopFlag = true;

        t = null;

    }

// Display the banner.

    public void paint(Graphics g) {

        g.drawString(msg1, k1 + (-60), 50);

        g.drawString(msg2, k2 + (-60), 100);

        g.drawString(msg3, k3 + (-60), 150);

        g.drawString(msg4, k4 + (-60), 200);

        int xpoints1[] = {1, UserX - 1, UserX - 1, 1};

        int ypoints1[] = {1, 1, UserY - 1, UserY - 1};

        int num1 = 4;

        g.drawPolygon(xpoints1, ypoints1, num1);

        int xpoints2[] = {2, UserX - 2, UserX - 2, 2};

        int ypoints2[] = {2, 2, UserY - 2, UserY - 2};

        int num2 = 4;

        g.drawPolygon(xpoints2, ypoints2, num2);

    }

}

Dictionary:

import java.io.*;

import java.sql.*;

/**

 *

 * @author Akhilesh

 */

public class NewDictionary {

    public static void main(String args[]) throws SQLException, ClassNotFoundException, IOException {

        Connection con = prepareConnection();

        Statement st = con.createStatement();

        String query = "select * from [Sheet1$]";

        ResultSet rs = st.executeQuery(query);

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        System.out.print("Enter Your Word Here:");

        String i = br.readLine();

        int count = 0;

        System.out.println("Word\tMeaning:\n");

        while (rs.next()) {

            if (i.equals(rs.getString("word"))) {

                System.out.println(i + "\t" + rs.getString("meaning") + "\t\n");

                count = 1;

            }

        }

        if (count == 0) {

            System.out.println("\nWord Does NOT matched in Dictionary\n");

        }

    }//main

    public static Connection prepareConnection() throws SQLException, ClassNotFoundException {

        String driverClassName = "sun.jdbc.odbc.JdbcOdbcDriver";

        String url = "jdbc:odbc:mydsn";

        Class.forName(driverClassName);

        return DriverManager.getConnection(url);

    }//prepareConnection

}//class

Copy One DB to Another DB:-

package com;

import java.io.*;

import java.sql.*;

/**

 *

 * @author Akhilesh

 */

public class DBCopy {

    public static void main(String args[]) throws SQLException, ClassNotFoundException, IOException {

//excel connection

        Connection conDb1 = prepareConnectionDB1();

        Statement stmtDb1 = conDb1.createStatement();

        String queryDb1 = "select * from [Sheet1$]";

        ResultSet rsDb1 = stmtDb1.executeQuery(queryDb1);

// mysql connection

        Connection conDb2 = prepareConnectionDB2();

        Statement stmtDb2 = conDb2.createStatement();

//String queryDb2a = "Create table data(word varchar(45),meaning varchar(300))";

//stmtDb2.executeUpdate(queryDb2a);

        ResultSet rsDb2 = null;

        System.out.println("table created");

        String queryDb2b = "select * from data";

        rsDb2 = stmtDb2.executeQuery(queryDb2b);

        System.out.println("Words\t\tMeanings");

        while (rsDb2.next()) {

            System.out.println(rsDb2.getString("word") + "\t" + rsDb2.getString("meaning"));

        }

        rsDb1.close();

        conDb1.close();

        rsDb2.close();

        conDb2.close();

    }//main

    public static Connection prepareConnectionDB1() throws SQLException, ClassNotFoundException {

        String driverClassName = "sun.jdbc.odbc.JdbcOdbcDriver";

        String url = "jdbc:odbc:mydsn";

        Class.forName(driverClassName);

        return DriverManager.getConnection(url);

    }//prepareConnectionDB1

    public static Connection prepareConnectionDB2() throws SQLException, ClassNotFoundException {

        String driverClassName = "com.mysql.jdbc.Driver";

        String url = "jdbc:mysql://localhost:3306/dictionary";

        String userName = "root";

        String password = "root";

        Class.forName(driverClassName);

        return DriverManager.getConnection(url, userName, password);

    }//prepareConnectionDB2

}//class

Dangling Pointer:

#include<iostream.h>
#include<conio.h>
int main()
{
char *dp = NULL;
{
char c='A';
dp = &c;
} 
/* c falls out of scope */ 
//cout<<"result="<<c; /* dp is now a dangling pointer */
cout<<"result="<<dp;
getch();
}

Stringizing Operater and Token-passing Operater:

#include<stdio.h>
#include<conio.h>
#define c(i) printf("x"#i"=%d",x##i)
main()
{
int x3=5;
clrscr();
c(3);
getch();
}
// # stringizing operater.
// ## token-passing operater.