컴퓨터 활용 과 실습1


                  배열



//Array.java
class Array {
  public static void main(String args[]) {
    String weekly_days[] = new String[7];
    weekly_days[0] = "월요일";
    weekly_days[1] = "화요일";
    weekly_days[2] = "수요일";
    weekly_days[3] = "목요일";
    weekly_days[4] = "금요일";
    weekly_days[5] = "토요일";
    weekly_days[6] = "일요일";
    //weekly_days[6] = "개요일";

    System.out.println("제일 좋아하는 요일은 " + weekly_days[5] + " 입니다.");
  }
}
//AutoArray.java
class AutoArray {
  public static void main(String args[]) {
  String weekly_days[] = {"월요일","화요일","수요일","목요일","금요일","토요일","일요일"};
  System.out.println("제일 좋아하는 요일은 " + weekly_days[5] + " 입니다.");
  }
}
//TwoArray.java
class TwoArray {
  public static void main(String args[]) {
    int two_array[][]= new int[4][5];
    int i, j, k = 0;

    for(i=0; i <5; i++) 
      for(j=0; j <5; j++) {
        two_array[i][j] = k;
        k++;
      }

    for(i=0; i <4; i++) {
      for(j=0; j <5; j++)
        System.out.print(two_array[i][j] + " ");
      System.out.println();
    }
  }
}
//TwoDA.java
class TwoDA {
  public static void main(String args[]) {
    int twoD[][] = new int[4][];
    twoD[0] = new int[1];
    twoD[1] = new int[2];
    twoD[2] = new int[3];
    twoD[3] = new int[4];

    int i, j, k = 100;

    for(i=0 ; i <4 ; i++) 
      for(j=0 ; j <i+1 ; j++) {
        twoD[i][j] = k;
        k++;
      }
     
    for(i=0 ; i <4 ; i++) {
      for(j=0 ; j < +1 ; j++)
        System.out.print(twoD[i][j] + " ");
      System.out.println();
    }  
  }
}
//ThreeDA.java
class ThreeDA {
  public static void main(String args[]) {
    int threeD[][][] = new threeD[3][4][5];
    int i, j, k;
    
    for(i=0; i < 3; i++) 
      for(j=0; j < 4; j++)
        for(k=0; k < 5; k++)
        threeD[i][j] = i;

    for(i=0; i <=3; i++) {
      System.out.println((i+1) + "번째 2 차원 배열 ");
      for(j=0; j<4; j++) {
        for(k=0; k<5; k++) 
          System.out.print(threeD[i][j][k] + " "); 
        System.out.println();
      }
      System.out.println();
    }
  }
}