5가지 별찍기 실습

 

class StarPrint {

     public static void main(String[] args) {

/*

*

**

***

****

*****

*/

          System.out.println("\n1)=============\n\n");

          for (int i=0; i<5; i++) { 
               for (int j=0; j                   System.out.print("O");
               }
               System.out.println();
          }

/*

*****

****

***

**

*

*/

          System.out.println("\n2)=============\n\n");

          for (int i=0; i<5; i++) { 
               for (int j=0; j<5-i; j++) {
                   System.out.print("O");
               }
               System.out.println();
          }

/*

     *

    **

   ***

  ****

 *****

*/

          System.out.println("\n3)=============\n\n");

          for (int i=0; i<5; i++) { 
                for (int j=4; j>i; j--) {
                     System.out.print(" ");
                }
                for (int j=0; j                     System.out.print("O");
                }
                System.out.println();
         }

/*

*   *

 * *

  *

 * *

*   *

*/
         System.out.println("\n4)=============\n\n");

         for (int i=0; i<5; i++) { 
              for (int j=0; j<5; j++) {
                   if (i==j || (i+j)%4==0) {
                        System.out.print("O");
                   } else {
                        System.out.print(" ");
                   }
              }
              System.out.println();
         }

/*

*****

*    *

*    *

*    *

*****

*/
         System.out.println("\n5)=============\n\n");

         for (int i=0; i<5; i++) { 
              for (int j=0; j<5; j++) {
                   if (i==0 || i==4 || j==0 || j==4) {
                        System.out.print("O");
                   } else {
                        System.out.print(" ");
                   }
              }
              System.out.println();
        }

     } // main

} // class