I am neo java week 6

 

Skill builder

1. Baldwin High School's Best Programmer Contest is organized today and the contest hones the students coding skills by making them solve different challenges

import java. io.*; import java. util.*; class NumberType{ public static int findType(int a){ int i, j=0; for (i=1; i<=a/2;i++) if(a%i==0) {j=j+i;} if (j==a) return 0; else if(j>a)return -1; else return 1; } public static void main(String [] args) { int num; Scanner sc = new Scanner(System. in); num = sc.nextInt(); if (findType(num)==0) System. out. println(num+" is a perfect number"); else if(findType(num)==1) System. out. println(num+" is a deficient number"); else System. out. println(num+" is an abundant number"); }}

2. Write a program to print the numbers from 1 to n without using loops.

import java. io.*; import java. util.*; class Main { public static void printNumbers (int num) { if(num>0){ printNumbers(num-1); System. out . print (num+" "); } return; } public static void main(String [] args) { int num, rev=0, digit; Scanner sc = new Scanner(System. in); num = sc. nextInt(); printNumbers (num); }}

3. Auditions

"Singing Champs" is a famous reality series.

import java. io.*; import java. util.*; class Position { static int x=1; public static int findPos(int pos) { x=x*2; if(pos>x) return findPos(pos); if (pos==x){return x;} return x/2; } public static void main(String [] args) { int n; Scanner sc = new Scanner(System. in); n = sc.nextInt(); System. out. println(findPos(n)); }}

4. Entrance Test

"Success Academy" has arranged for a entrance test for High School students from rural villages.

import java. io.*; import java. util.*; class countways { public static int count(int x, int n, int num){ int i; i=(int) (x-Math. pow(num,n) ); if (i==0) return 1; if( i<8 ) return 0; else return count (i, n, num+1)+count(x, n, num+1); } public static int NumberofWays(int x, int n) { return count (x, n, 1); } public static void main(String [] args) { int x, n; Scanner sc = new Scanner(System. in) ; x = sc. nextInt(); n = sc. nextInt(); System. out. println(NumberofWays(x, n)); }}

5. Create two methods namely main and speed

import java. util. Scanner; class Main{ public static void main (String args[]){ double dis, time; Scanner sc=new Scanner(System. in); dis=sc. nextDouble( ); time=sc. nextDouble(); speed (dis, time); } static void speed(double x, double y) { double fast=x / y; System. out . print(fast); }}

6. Simplified Fraction

St. Patrick Convent organizes a project exhibition "Innovative Minds"

import java. io.*; import java. util.*; class Fraction { public static void printValue(int a, int b) { int i; if((a>=b)||(a==0)) System. out . print(a/b+" "); for (i=2;i<=a/2;i++){ if( (a%i==0)&&(b%i==0)) { a=a/i; b=b/i; i=1; } } if ( a%b!=0) { System. out . println(a%b+"/"+b); } } public static void main(String [] args) { int dividend, divisor; Scanner sc = new Scanner (System. in); dividend = sc.nextInt( ); divisor = sc.nextInt(); printValue(dividend, divisor); }}

7. Art Competition

Ocean Awareness Art Competition is a yearly

import java. io.*; import java. util.*; class EnrollNumbers { static int i=1; public static void printNumbers(int n) { if (i<=n) { System. out . print (i+" "); i++; printNumbers(n); } } public static void main(String [] args) { int n; Scanner sc = new Scanner(System. in); n = sc.nextInt( ); printNumbers(n) ; }}

8. Math Olympiad

The KISA Math Olympiad is held annually

import java. io.*; import java.util.*; class FindSum { public static int summation(int n, int m) { if(m==0) return n; { n=n*(1+n)/2; n=summation(n, m-1); } return n; } public static void main(String [] args) { int n, m; Scanner sc = new Scanner (System. in); n = sc. nextInt(); m= sc. nextInt( ) ; int res = summation(n,m); System. out. println(res); }}

9. Write a Program to reverse the digits of a given number.

import java. util. *; class Main{ public static void main(String ar[]){ Scanner sc=new Scanner(System.in); int num=sc. nextInt(); int t=0; while (num!=0) { t=(t*10)+(num%10); num=num/10; } System. out. println(t); }}

10. Manoj wants to give an even number of chocolates to his friend.

import java. util. Scanner; class Chocolates { public static void isEven(int n) { if(n%2 == 0) { System. out. println("even"); isMultiple(n); } else System. out. println("not even"); } public static void isMultiple(int n) { if(n%10 == 0) System. out. println("multiple of 10"); else System. out. println("not a multiple of 10"); } public static void main(String [] args) { int number; Scanner sc = new Scanner (System.in) ; number = sc.nextInt(); isEven (number); }}

Challange yourself

1. Write a program to obtain an array and pass it to a function to find the average.

import java. util. Scanner; import java. text. DecimalFormat; class Array { public static double average(int [] a , int n) { int i, sum=0; double avg; for (i=0; i<n; i++) { sum+= a[i]; } avg = sum/n; return avg; } public static void main(String [] args) { int i,n; Scanner sc = new Scanner(System. in) ; n = sc. nextInt( ); int [] arr = new int[n]; DecimalFormat d = new DecimalFormat("0.00"); for (i=0; i<n; i++) { arr[i] = sc. nextInt(); } System. out . println(d. format(average(arr,n) )); }}

2. Write a program to find the GCD of two numbers using recursion.

import java. util. Scanner; class Test{ static int gcd(int a, int b) { if (a == 0) return b; if (b == 0) return a; if (a == b) return a; if (a > b) return gcd(a-b, b); return gcd(a, b-a); } public static void main(String[] args){ int a, b; Scanner sc = new Scanner(System. in) ; a = sc. nextInt( ); b = sc.nextInt( ); System. out. println(gcd(a, b)); }}

3. Write a Program to calculate the power of a number.

import java.util.*; class Main { static int power (int N, int P) { if (P == 0) return 1; else return N * power (N, P - 1) ; } public static void main(String[] args){ Scanner sc=new Scanner(System. in); int N=sc. nextInt( ); int P=sc. nextInt( ); //int N = 2; //int P = 3; System. out. println(power(N, P)); }}

4. Asha’s birthday is shortly coming and her parents have planned to arrange for a house party

import java. io.*; import java. util.*; class ReverseNumber { static int rev = 0; public static int reverse(int n) { if (n!=0) { rev=(rev*10)+(n%10); reverse(n/10); } return rev; } public static void main(String [] args) { int n; Scanner sc =new Scanner(System. in); n = sc. nextInt(); n = reverse(n); System. out. println(n); }}

5. St. Patrick Convent organizes a project exhibition "Innovative Minds"

import java. io.*; import java. text. DecimalFormat; import java. util.*; class BestMobilePlan{ public static void printPlanDetails(int d, int e, int n){ float a=0, b=0; DecimalFormat d1 = new DecimalFormat("0.00"); if(d>100) {a=(float) ((d-100)*0.25);} if(d>250) {b=(float) ((d-250)*0.45);} a=(float) (a+(e*0.15)+(n*0.2)); b=(float) (b+(e*0.35)+(n*0.25)); System.out. println("plan A costs "+d1. format(a)); System.out.println("Plan B costs "+d1. format(b)); if(a==b) {System. out . println( "Plan A and B are the same price"); } else { if(a<b) System. out. println("Plan A is cheapest"); else System. out. println("Plan B is cheapest"); } } public static void main(String [] args) { int day, eve, night; Scanner sc = new Scanner(System. in); day = sc. nextInt(); eve = sc.nextInt(); night = sc. nextInt(); printPlanDetails (day, eve, night); }}