190702 함수, 2차원 배열

package prj190702;

import java.util.*;


public class Doublefor_1 {


========================*찍는 피라미드 함수
	public static void Pyramid(int a) {
		for(int i=0; i<a; i++) {
			for(int j=0; j<=i; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}
	/////함수 오버로딩
	// 인자 두개 받아서 p값만큼 별 갯수 증가시킴 즉 a에 10, p에 2면 1>3>5>7 식으로 별 찍힘
	public static void Pyramid(int a, int p) {
		for(int i=0; i<a; i+=p) {
			for(int j=0; j<=i; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}
===================2차원 배열====================

	public static void main(String[] args) {
		int [] [] sdim = new int [5][3];
		
		
		for(int i =0; i<sdim.length; i++) {//열
			System.out.println("외부"+sdim.length);
			
			for(int j =0; j<sdim[i].length; j++) {//행
				sdim[i][j] = 10;
				System.out.print(sdim[i].length);
			}
			System.out.println("===========================");
		}

//===========================2차원 배열==========================
		for(int i =0;  i<sdim.length; i++) {
			for(int j =0; j<sdim[i].length; j++) {
				sdim[i][j] = (i+1)*5;
			}
		}

		for(int i =0;  i<sdim.length; i++) {
			for(int j =0; j<sdim[i].length; j++) {
				System.out.print(sdim[i][j]+"  ");
			}
			System.out.println();
		}
		
		
========================함수이용한 *찍기=============================		
		
		System.out.print("별 피라미드 몇 열? :");		
		Scanner scan = new Scanner(System.in);		
		int hang = scan.nextInt();
		System.out.print("별 증가 수? :");	
		int yeol = scan.nextInt();
		Pyramid(hang, yeol);
		System.out.println("========================================");
		Pyramid(hang);

===========================함수이용=================================
		System.out.print("메뉴 입력: ");	
		Scanner scan = new Scanner(System.in);		
		char menu = scan.next().charAt(0);
		
		switch(menu) {
		case 'a' :
			System.out.print("단수 입력: ");
			int dan = scan.nextInt();
			Gugudan(dan);
			break;
		case 'b' : 
			System.out.print("숫자 입력: ");
			int Soo = scan.nextInt();
			Sum(Soo);
			break;
		}
		

				
	}
    
	public static void Gugudan(int a) {	
			for(int j =1; j<=9; j++) System.out.printf("%d * %d = %d\n", a, j,a*j);
	}
	
	public static void Sum(int a) {
		int sum = a *30;
		System.out.println(sum);
	}
}