Lab4

// Lab4
// Problem 1 (using scanner)
import java.util.Scanner;
class Problem1{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num1=sc.nextInt();
        char c=sc.next().charAt(0);
        int num2=sc.nextInt();
        if (c=='+'){
            int z=num1+num2;
            System.out.print(z);
        }
        if (c=='-'){
            int z=num1-num2;
            System.out.print(z);
        }
        if (c=='*'){
            int z=num1*num2;
            System.out.print(z);
        }
        if (c=='/'){
            double z=(double)num1/num2;
            System.out.print(z);
        }
        if (c=='%'){
            int z=num1%num2;
            System.out.print(z);
        }
    }
}

// Problem 1 (using command-line arguments)
public class command{
    public static void main(String args[]){
        int z=Integer.parseInt(args[0]);
        char c=args[1].charAt(0);
        int y=Integer.parseInt(args[2]);
        if (c=='+'){
            System.out.println(y+z);
        }
        if (c=='-'){
            System.out.println(y-z);
        }
        if (c=='*'){
            System.out.println(y*z);
        }
        if (c=='/'){
            float x=(float)z/(float)y;
            System.out.println(x);
        }
        if (c=='%'){
            System.out.println(z%y);
        }
    }
}

// Problem 2
import java.util.*;
class Problem2{
    static boolean ctain(String s,String t){
        int max=s.length()-t.length();
        int n =t.length();
        for(int i=0;i<=max;i++){
            for(int j=0;j<n;j++){
                if(s.charAt(i+j)!=t.charAt(j)){
                    break;
                }
                else if(j==n-1){
                    return true;
                }
            }
        }
        return false;
    }
    static String ccat(String s, String t){
        String u=s+t;
        return u;
    }
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        String S=sc.nextLine();
        String T=sc.nextLine();
        System.out.println(ccat(S,T));
        if (ctain(S,T)==true){
            System.out.println("The second string is a substring of the first string");
        }
        else {
            System.out.println("The second string is not a substring of the first string");
        }
    }
}
// Problem 3
import java.util.*;
public class Problem3{
    static double findDistance(double x, double y, double a, double b){
        double z=Math.pow((x-a)*(x-a)+(y-b)*(y-b),0.5);
        return z;
    }
    public static void main(String args[]){
        Point object1=new Point();
        Point object2=new Point();
        System.out.println("Point 1 is : (" + object1.first + ", " + object1.second + ")");
        System.out.println("Point 2 is : (" + object2.first + ", " + object2.second + ")");
        System.out.println("The distance between the two points is: " +  findDistance(object1.first, object1.second, object2.first, object2.second));
    }
}
class Point{
    double z=Math.random()*100;
    double first=z;
    double y=Math.random()*100;
    double second=y;
}
// Problem 4 (by atish)
import java.util.*;
public class Program4{
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        timestamp one= new timestamp("08:20:46");
        String two=sc.nextLine();
        timestamp result=timestamp.add(one,two);
        timestamp.print(result);
    }
}
class timestamp{
    int hours;
    int minutes;
    int seconds;
    timestamp(){
        hours=0;
        minutes=0;
        seconds=0;
    }
    timestamp(String s){
        char h1=s.charAt(0); int h1i=h1-48;
        char h2=s.charAt(1); int h2i=h2-48;
        char m1=s.charAt(3); int m1i=m1-48;
        char m2=s.charAt(4); int m2i=m2-48;
        char s1=s.charAt(6); int s1i=s1-48;
        char s2=s.charAt(7); int s2i=s2-48;
        this.hours=h1i*10+h2i;
        this.minutes=m1i*10+m2i;
        this.seconds=s1i*10+s2i;
    }
    static timestamp add(timestamp in,String b){
        timestamp add= new timestamp(b);
        timestamp out=new timestamp();
        out.seconds=(in.seconds+add.seconds)%60;
        out.minutes=(in.minutes+add.minutes+(in.seconds+add.seconds)/60)%60;
        out.hours=(in.hours+add.hours+(in.minutes+add.minutes+(in.seconds+add.seconds)/60)/60)%24;
        return out;
    }
    static void print(timestamp t){
        System.out.print(t.hours);
        System.out.print(":");
        System.out.print(t.minutes);
        System.out.print(":");
        System.out.println(t.seconds);
    }
}

// Problem 5 (using Math.random())
import java.util.*;
public class command2{
    public static void main(String args[]){
        int x=(int)(Math.random()*100);
        int y=(int)(Math.random()*100);
        int z=(int)(Math.random()*100);
        Rectangle a=new Rectangle();
        System.out.println("length: " + a.length +" breadth: " + a.width);
        System.out.println("area: " + Rectangle.area(a));
        Rectangle b=new Rectangle(x);
        System.out.println("length: " + b.length +" breadth: " + b.width);
        System.out.println("area: " + Rectangle.area(b));
        Rectangle c=new Rectangle(y,z);
        System.out.println("length: " + c.length +" breadth: " + c.width);
        System.out.println("area: " + Rectangle.area(c));
    }
}
class Rectangle{
    int width;
    int length;
    Rectangle(){
        this.length=0;
        this.width=0;
    }
    Rectangle(int a){
        this.length=a;
        this.width=a;

    }
    Rectangle(int a, int b){
        this.length=a;
        this.width=b;
    }
    static int area(Rectangle a){
        return a.length*a.width;
    }
}

// Problem 5 (by atish)
import java.util.*;

class Rectangle{
    int length;
    int width;
    Rectangle(){
        this.length=0;
        this.width=0;
    }
    Rectangle(int a){
        this.length=a;
        this.width=a;
    }
    Rectangle(int a,int b){
        this.length=a;
        this.width=b;
    }
    static int calculate(Rectangle a){
        return a.length*a.width;
    }
}
public class Problem5{
    public static void main(String[] args){
        Rectangle a= new Rectangle();
        System.out.println(Rectangle.calculate(a));
        Rectangle b= new Rectangle(5);
        System.out.println(Rectangle.calculate(b));
        Rectangle c= new Rectangle(5,7);
        System.out.println(Rectangle.calculate(c));
    }
}