ali nasrun's blog

It's not mine purely. I copied from someone and modified it.


import java.util.Random;
public class spiral_ali {
public static void main(String args[]){
        Random input = new Random ();
        int dimensi = 3+1*input.nextInt(8);
        int n = dimensi;
       
        int array[][]=new int [n][n];
        int s,c=1,i=0,j=n-1;//s=batasan looping,c=nilai elemen array,i=baris,j=kolom

        while(n>=1){
                for(s=1; s
                    array[i][j]=c++;
                    j--;
                }
                for(s=1; s
                    array[i][j]=c++;
                    i++;
                }
                for(s=1; s
                    array[i][j]=c++;
                    j++;
                }
                for(s=1; s
                    array[i][j]=c++;
                    i--;
                }
                i++;
                j--;
                n=n-2;//masuk ke dalam
                if(n==1) array[i][j]=c++;

        }

        for( i=0; i < dimensi; i++){
            for( j=0; j
                if (array[i][j] < 10)  System.out.print(" ");  // for alignment
                if (array[i][j] < 100)  System.out.print(" ");
                 System.out.print(array[i][j]+" ");
            }
            System.out.println();
        }

    }
}


If input is 10, the output is:

Below are simple examples in java programming for beginner. This examples is a collection from programming lecture that i received at first semester in Institut Teknologi Sepuluh Nopember Surabaya (Institute of Technology).


1. Counting amoeba
Case: amoeba devides itself, so its number become twice after. But in this case, amoeba devides itself if even day only. First day, the number is 25, second day 50, thirth day 50, fourth day 100, .... until 30 days

The codes is:

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