[JAVA]Javaプログラミング05

package week 06

public class prac06 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int i=1;
		int num=10;
		int k=1;
		
		while(i<=num) {
			int j=1;
		
			for(k=num-1;k>=i;k--)
				System.out.print(" ");
			while(j<=i) {
				System.out.print("* ");
				j++;
			}
			System.out.println();
			i++;
		}
	}
}

package week06

public class prac06 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int dan=2;
		
		while(dan<10) {
			int i=1;
			System.out.println(dan+"단");
			while(i<10) {
				System.out.println(dan +"*"+ i + "=" +dan*i);
				i++;
			}
			System.out.println();
			dan++;
		}

	}
}

package week06

import java.util.*;

public class prac06 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int n;
		int f0=0,f1=1,f2;
		Scanner s=new Scanner(System.in);
		System.out.println("출력할 숫자 개수");
		n=s.nextInt();
		System.out.print("0 1 ");
		
		for(int i=0;i<n-2;i++) {
			f2=f0+f1;
			System.out.print(f2+" ");
			f0=f1;
			f1=f2;
		}
	}
}

package week06

import java.util.Scanner;

public class prac06 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner stdIn=new Scanner(System.in);
		System.out.print("하나의 문자를 입력하시오 : ");
		String s=stdIn.next();
		char c=s.charAt(0);
		
		for(int i=(int)c;i>=97;i--) {
			for(int j=0;j<=(int)c-i;j++) {
				System.out.print((char)('a'+j)+" ");
			}
			System.out.println();
		}
	}
}

package week06

public class prac06 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int prime=2;
		int i;
		
		System.out.print("1부터 100사이 모든 소수 : ");
		for(prime=2;prime<=100;prime++) {
			int notp=0;
			for(i=2;i<prime;i++) {
				if(prime%i==0)
					notp+=1;
			}
			if(notp==0)
				System.out.print(prime+" ");
		}
	}
}

package week06

import java.util.Scanner;

public class prac06 {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner stdIn=new Scanner(System.in);
		int rand=(int)(Math.random()*100);
		int num;
		int tries=0;
		int i=1;
		
		int min=0;
		int max=99;
		
		System.out.println("컴퓨터가 수를 정했습니다. 시작합니다.");
		while(true){
			
			System.out.println(min+" - "+max+ "사이의 값을 입력하세요");
			System.out.print(i+" "+">>"+" ");
			num=stdIn.nextInt();
			tries++;
			i++;
			
			if(rand>num) {
				System.out.println("더 높은 값을 입력하세요");
				System.out.println();
				min=num+1;
				
			}
			else if(rand<num) {
				System.out.println("더 낮은 값을 입력하세요");
				System.out.println();
				max=num-1;
			}
			else if(rand==num) {
				System.out.println(tries+"번 만에 숫자 "+ num+"을 맞추었습니다!");
				break;
			}		
		}
	}
}