Sunday, January 5, 2025
Friday, August 16, 2024
2nd CSE R23 JAVA DAY TO DAY LAB/CLASS SOLUTIONS
java tools
-------------------
javac
java
javap
appletviewer
javah
jdb
javadoc
// rect program
class Rect
{
int len,bre;
void get(int l,int h)
{
len=l;
bre=h;
}
void area(){
System.out.println("Area ="+len*bre)
}
public static void main(String a[])
{
Rect r=new Rect();
r.area();
r.get(10,11);
r.area();
}
}
-------------------------17-8-24
import java.lang.Math;
public class Main
{
public static double PI=3.14F;
public static void main(String[] args) {
System.out.println(Math.sqrt(4));
System.out.println(Math.ceil(4.3));
System.out.println(Math.floor(4.3));
System.out.println(PI);
}
}
2.0
5.0
4.0
3.140000104904175
--------------------------------------------------------
import java.lang.Math;
class A{
final void dis(){}
}
class B extends A
{
void dis(){}
}
output:
Main.java:10: error: dis() in B cannot override dis() in A
void dis(){}
^
overridden method is final
1 error
-----------------------------------------------------
import java.lang.Math;
final class A{
void dis(){}
}
class B extends A
{
void dis(){}
}
public class Main
{
public static void main(String[]a)
{
B bobj=new B();
bobj.dis();
}
}
output:
Main.java:8: error: cannot inherit from final A
class B extends A
^
1 error
java tools
-------------------
javac
java
javap
appletviewer
javah
jdb
javadoc
// rect program
class Rect
{
int len,bre;
void get(int l,int h)
{
len=l;
bre=h;
}
void area(){
System.out.println("Area ="+len*bre)
}
public static void main(String a[])
{
Rect r=new Rect();
r.area();
r.get(10,11);
r.area();
}
}
-------------------------17-8-24
import java.lang.Math;
public class Main
{
public static double PI=3.14F;
public static void main(String[] args) {
System.out.println(Math.sqrt(4));
System.out.println(Math.ceil(4.3));
System.out.println(Math.floor(4.3));
System.out.println(PI);
}
}
2.0
5.0
4.0
3.140000104904175
--------------------------------------------------------
import java.lang.Math;
class A{
final void dis(){}
}
class B extends A
{
void dis(){}
}
output:
Main.java:10: error: dis() in B cannot override dis() in A
void dis(){}
^
overridden method is final
1 error
-----------------------------------------------------
import java.lang.Math;
final class A{
void dis(){}
}
class B extends A
{
void dis(){}
}
public class Main
{
public static void main(String[]a)
{
B bobj=new B();
bobj.dis();
}
}
output:
Main.java:8: error: cannot inherit from final A
class B extends A
^
1 error
--------------inheritance-----------
import static java.lang.System.out;
class Student{
protected int sno;
protected String sname;
public Student() {
sno=10;
sname="xyz";
out.println("Student()");
}
public Student(int sn,String snm) {
sno=sn;
sname=snm;
out.println("Student(int,String)");
}
}
class Mpc extends Student{
private int maths,phy,che;
public Mpc() {
maths=phy=che=40;
out.println("Mpc()");
}
public Mpc(int sn,String snm,int m,int p,int c) {
super(sn,snm);
maths=m;phy=p;che=c;
out.println("Mpc(int,int,int)");
}
public void dis() {
out.println(sno+"\t"+sname);
out.println(maths+"\t"+phy+"\t"+che);
}
}
public class InheritanceTest {
public static void main(String[] args) {
Mpc m=new Mpc();
m.dis();
Mpc m1=new Mpc(101,"Raj",90,80,77);
m1.dis();
}
}
Output :
Student()
Mpc()
10 xyz
40 40 40
Student(int,String)
Mpc(int,int,int)
101 Raj
90 80 77
------------call by val --------------
class Swap{
int x,y;
public Swap(int a,int b){
x=a;
y=b;
}
public void swapval(){
int tmp;
tmp=x;x=y;y=tmp;
}
public void disval(){
System.out.println("x="+x+" y="+ y);
}
}
public class CallByVal
{
public static void main(String[] args) {
int L=10,M=20;
Swap s=new Swap(L,M);
s.disval();
s.swapval();
System.out.println(L+"\t\t"+M);
}
}
---------------------- menu program--------------------
import java.util.Scanner;
class Account{
int ano;
double amt;
public void addacc(int a,double amt){
ano=a;
this.amt=amt;
}
public void dis(){
System.out.println(ano+"\t\t"+amt);
}
public void credit(double cr){
amt+=cr;
}
}
public class Main
{
public static void main(String[] args) {
Account a=new Account();
String ch;
int cho;
Scanner in=new Scanner(System.in);
while(true){
System.out.println("1 add account");
System.out.println("2 dis account");
System.out.println("3 credit amount");
System.out.println("0 EXIT");
System.out.println("Choice?");
ch=in.nextLine();
cho=Integer.parseInt(ch);
switch(cho){
case 1:
a.addacc(1001,10000.5);
break;
case 2:
a.dis();
break;
case 3: a.credit(1000); break;
case 0: System.exit(0);
}
}
}
}
-------------------------------------------------------------
Friday, February 16, 2024
Thursday, August 31, 2023
LINKS FOR MINI PROJECTS & GOOGLE CLASS ROOM LINKS FOR CPP
LINKS FOR C/CPP/JAVA/PYTHON MINI PROJECTS
The
following are the links for Google class room:
Google Class Room Code for CSE-2 & 3 : 2d3wu5q
https://classroom.google.com/c/MTIyOTE2NTA2NDUy?cjc=2d3wu5q
Google Class Room Code for CSE-2 & 3 : pe2eeyh
https://classroom.google.com/c/MTIyOTE2NTA2NDYy?cjc=pe2eeyh
The following are the links for mini projects source code
( Note : Explore or
google for more information )
https://www.interviewbit.com/blog/c-projects/
https://www.codewithc.com/c-projects-with-source-code/
https://itsourcecode.com/free-projects/c-projects/c-projects-with-source-code-for-beginners/
https://www.crio.do/blog/mini-projects-for-computer-science-engineers/
https://takeoffprojects.com/page/blog/mini-projects-for-cse
https://code-projects.org/c/languages/project/cprojects/
https://www.cppbuzz.com/projects/c/download-c-projects
https://www.codewithc.com/c-projects-with-source-code/
Minin Titles:
·
Sudoku
Game.
·
Trading
Application Project In C++
·
Casino
Number Guessing Game.
·
Sales
Management System.
·
Face
Detection App with C++
·
Digital
Calculator.
·
Tic-Tac-Toe
·
Department Store Management System
·
Medical Store Management System
·
Personal Diary Management System
·
Student Database
Management System
Some Advanced Projects in C and C++:
These are some projects with
wider scope, utilizing the advanced aspects and graphics of C and C++
programming.
·
Snakes and Ladders Game in C
·
Bike Race Game (using SDL) in C++
·
Database Management
System (using wxWidgets) in C++
·
Fortune Teller (Predict Future) in C++
·
Helicopter Game (using SDL) in C++
·
Search Engine in C++
·
Tank Game in C++
·
Traffic
Control Management System in C++
·
University
Management System in
C++
·
3D Bounce Ball Game in OpenGL
More C and C++ Projects:
More projects for you! We haven’t
had the time to publish these projects, so we’ll just provide a download link
to the ones mentioned below.
·
Copter Game (using Allegro)
in C
·
Balloon Shooting Game in C++
·
Canteen Management System
in C++
·
Casino
Game in C++
·
Digital
Clock in C++
·
Memory
Game in C++
·
Music Store Management
System in C++
·
School Fee Inquiry Management System in C++
·
Shuffle
Game in C++
·
Snakes and Ladders Game
in C++
·
Sudoku
Game in C++
·
Telephone Billing System in C++
·
Travel Agency
Management System in C++
Friday, May 5, 2023
Thread, Multi Thread & setting thread priority
single thread program
class MyThread extends Thread{
Thread t;
public MyThread(String msg){
t=new Thread(msg);
}
public void run()
{
for(int i=1;i<=5;i++){
try{
t.sleep(1000);
System.out.println(t.getName()+" : "+i);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
public class Main
{
public static void main(String[] args) {
MyThread t1=new MyThread("Theread-1");
t1.start();
}
}
-------------------------------------------------------------
multi thread
class MyThread extends Thread{
Thread t;
public MyThread(String msg){
t=new Thread(msg);
}
public void run()
{
for(int i=1;i<=5;i++){
try{
t.sleep(1000);
System.out.println(t.getName()+" : "+i);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
public class Main
{
public static void main(String[] args) {
MyThread t1=new MyThread("Theread-1");
MyThread t2=new MyThread("Theread-2");
MyThread t3=new MyThread("Theread-3");
t1.start();
t2.start();
t3.start();
}
}
--------------------------------------------------------
thread priority
class MyThread extends Thread{
Thread t;
public MyThread(String msg){
t=new Thread(msg);
}
public void run()
{
for(int i=1;i<=5;i++){
try{
t.sleep(1000);
System.out.println(t.getName()+" : "+i);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
public class Main
{
public static void main(String[] args) {
MyThread t1=new MyThread("Theread-1");
MyThread t2=new MyThread("Theread-2");
MyThread t3=new MyThread("Theread-3");
t1.start();
t1.setPriority(Thread.MAX_PRIORITY);
t2.start();
t3.start();
}
}
Monday, December 26, 2022
Exception Handling in C++ & Void pointer
#include <iostream>
using namespace std;
int sum(int a,int b) throws (int,char)
{
if(a<0 && b<0)
throw 0;
cout<<(a+b)<<endl;
}
int main()
{
int age;
cout<<"Enter age?";
cin>>age;
try{
if(age<0)
throw 0;
else
if(age>100)
throw 'x';
else
if(age==0)
{
throw 0.0;
}
else
if(age==100){
throw "oho!";
}
cout<<"Age = "<<age<<endl;
}
catch(char ch) //handler prog
{
cerr<<"Illegal age";
}
catch(int ch) //handler prog
{
cerr<<"Age can't be negative";
}
catch(float f){
cerr<<"Age can't be zero";
}
catch(char *str){
cout<<str;
}
catch(...) //default handler
{
cout<<"Unknown error "<<endl;
}
return 0;
}
---------------------------------------------------------------------------------
void pointer example
#include <iostream>
using namespace std;
int main(void)
{
int no=100;
float f=10.345F;
void*n;
n=&f;
cout<<*(float*)n<<endl;
return 0;
}
Wednesday, November 2, 2022
Inheritance simple,multi level and code reusability
//Simple inheritance
#include <iostream>
using namespace std;
//base class
class Student
{
protected:
int sno;
char sname[20];
};
// derived clasds
class Mpc:public Student
{
private:
int maths,phy,che;
public:
void get()
{
cout<<"Enter no and name?";
cin>>sno>>sname;
cout<<"Enter Maths,phy & che marks?";
cin>>maths>>phy>>che;
}
void dis(){
cout<<sno<<"\t\t"<<sname<<endl;
cout<<maths<<"\t\t"<<phy<<"\t\t"<<che<<"\n";
}
};
int main()
{
Mpc obj;
cout<<sizeof(obj)<<endl;
obj.get();
obj.dis();
return 0;
}
// multi level inheritance
#include <iostream>
using namespace std;
//base class
class Student
{
protected:
int sno;
char sname[20];
};
// derived class
class Lang:public Student{
protected:
int eng,tel;
};
// derived clasds
class Mpc:public Lang
{
private:
int maths,phy,che;
public:
void get()
{
cout<<"Enter no and name?";
cin>>sno>>sname;
cout<<"Enter eng and tel marks?";
cin>>eng>>tel;
cout<<"Enter Maths,phy & che marks?";
cin>>maths>>phy>>che;
}
void dis(){
cout<<sno<<"\t\t"<<sname<<endl;
cout<<eng<<"\t\t"<<tel<<"\n";
cout<<maths<<"\t\t"<<phy<<"\t\t"<<che<<"\n";
}
};
int main()
{
Mpc obj;
cout<<sizeof(obj)<<endl;
obj.get();
obj.dis();
return 0;
}
output :
Enter no and name?101 Scott
Enter eng and tel marks?66 77
Enter Maths,phy & che marks?88 99 90
101 Scott
66 77
88 99 90
-------------------------
// multi level multi line inheritance
#include <iostream>
using namespace std;
//base class
class Student
{
protected:
int sno;
char sname[20];
};
// derived class
class Lang:public Student{
protected:
int eng,tel;
};
//derived class
class Pc:public Lang{
protected:
int phy,che;
};
// derived clasds
class Mpc:public Pc
{
private:
int maths;
public:
void get()
{
cout<<"Enter no and name?";
cin>>sno>>sname;
cout<<"Enter eng and tel marks?";
cin>>eng>>tel;
cout<<"Enter Maths,phy & che marks?";
cin>>maths>>phy>>che;
}
void dis(){
cout<<sno<<"\t\t"<<sname<<endl;
cout<<eng<<"\t\t"<<tel<<"\n";
cout<<maths<<"\t\t"<<phy<<"\t\t"<<che<<"\n";
}
};
// derived clasds
class Bpc:public Pc
{
private:
int bot,zoo,phy,che;
public:
void get()
{
cout<<"Enter no and name?";
cin>>sno>>sname;
cout<<"Enter eng and tel marks?";
cin>>eng>>tel;
cout<<"Enter phy,che,bot & zoo marks?";
cin>>phy>>che>>bot>>zoo;
}
void dis(){
cout<<sno<<"\t\t"<<sname<<endl;
cout<<eng<<"\t\t"<<tel<<"\n";
cout<<bot<<"\t\t"<<phy<<"\t\t"<<che<<"\t\t"<<zoo<<"\n";
}
};
int main()
{
Mpc m;
m.get();
m.dis();
Bpc b;
b.get();
b.dis();
return 0;
}
Enter no and name?101 Babe
Enter eng and tel marks?45 56
Enter Maths,phy & che marks?56 67 78
101 Babe
45 56
56 67 78
Enter no and name?102 Scott
Enter eng and tel marks?78 76
Enter phy,che,bot & zoo marks?56 56 56 56
102 Scott
78 76
56 56 56 56
---------------------------------------------------------
// concept of reusability of code
#include <iostream>
using namespace std;
//base class
class Student
{
protected:
int sno;
char sname[20];
public:
void get(){
cout<<"Enter no and name?";
cin>>sno>>sname;
}
void dis(){
cout<<sno<<"\t\t"<<sname<<endl;
}
};
// derived class
class Lang:public Student{
protected:
int eng,tel;
public:
void get(){
Student::get();
cout<<"Enter eng and tel marks?";
cin>>eng>>tel;
}
void dis(){
Student::dis();
cout<<eng<<"\t\t"<<tel<<"\n";
}
};
//derived class
class Pc:public Lang{
protected:
int phy,che;
public:
void get(){
Lang::get();
cout<<"Enter Phy and che marks?";
cin>>phy>>che;
}
void dis(){
Lang::dis();
cout<<phy<<"\t\t"<<che<<"\n";
}
};
// derived clasds
class Mpc:public Pc
{
private:
int maths;
public:
void get()
{
Pc::get();
cout<<"Enter Maths marks?";
cin>>maths;
}
void dis(){
Pc::dis();
cout<<maths<<"\n";
}
};
// derived clasds
class Bpc:public Pc
{
private:
int bot,zoo;
public:
void get()
{
Pc::get();
cout<<"Enter bot & zoo marks?";
cin>>bot>>zoo;
}
void dis(){
Pc::dis();
cout<<bot<<"\t\t"<<zoo<<"\n";
}
};
int main()
{
Mpc m;
m.get();
m.dis();
Bpc b;
b.get();
b.dis();
return 0;
}
output:
Enter no and name?101 Babe
Enter eng and tel marks?55 55
Enter Phy and che marks?66 66
Enter Maths marks?78
101 Babe
55 55
66 66
78
Enter no and name?102 Tiger
Enter eng and tel marks?67 78
Enter Phy and che marks?78 89
Enter bot & zoo marks?78 78
102 Tiger
67 78
78 89
78 78
Subscribe to:
Posts (Atom)