|
package demo; import java.util.Scanner; /* * 行数 空格 星 * 1 3 1 * 2 2 3 * 3 1 5 * 4 0 7 * */ public class Demo { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while(true){ int rows = sc.nextInt();
while(rows <= 0){ System.out.println("结束！"); break; }
//外层循环行数 for(int i = 1;i <= rows; i++){ for(int j = 1; j<= rows-i; j++){ System.out.print(" "); } for(int z= 1;z <= (2*i)-1; z++){ if(z == 1 || z == (2*i-1)){ System.out.print("*"); }else{ System.out.print(" "); }
} System.out.println(); }
for(int i = rows-1;i >= 1; i--){ for(int j = 1; j<= rows-i; j++){ System.out.print(" "); } for(int z= 1;z <= (2*i)-1; z++){ if(z == 1 || z == (2*i-1)){ System.out.print("*"); }else{ System.out.print(" "); } } System.out.println(); } }
} }
|
