java用for语句实现菱形_编写Java程序 应用for循环打印菱形 三角形

//输出三角形//左下

for(int m = 1; m <= 10; m++)

{for (int n = 1; n <= m; n++)

{

System.out.print("*");

}

System.out.println();

}//左上(1)

for(int m = 1; m <= 10; m++)

{for (int n = 10; n >= m; n--)

{

System.out.print("*");

}

System.out.println();

}//左上(2)

for(int m = 9; m >= 1; m--)

{for (int n = 1; n <= m; n++)

{

System.out.print("*");

}

System.out.println();

}//右下

for (int m = 1; m <= 10; m++)

{//输出空格

for (int n = 9; n >= m ;n--)

{

System.out.print(" ");

}//输出*

for (int n = 1; n <= m; n++)

{

System.out.print("*");

}

System.out.println();

}//右上(1)

for (int m = 1; m <= 9; m++)

{//输出空格

for (int n = 1; n <= m ;n++)

{

System.out.print(" ");

}//输出*

for (int n = 9; n >= m; n--)

{

System.out.print("*");

}

System.out.println();

}//右上(2)

for (int m = 10; m >= 1; m--)

{//输出空格

for (int n = 9; n >= m ;n--)

{

System.out.print(" ");

}//输出*

for (int n = 1; n <= m; n++)

{

System.out.print("*");

}

System.out.println();

}