计算杨辉三角形的前n（n<=10）行，并显示在屏幕上。要求计算及显示

用子程序形式实现。其显示格式为：

1

1 1

1 2 1

1 3 3 1

1 4 6 4 1

1 5 10 10 5 1-Yang hui triangle calculation of n n < = before 10) line, and displayed on the screen. Requirements calculation and display

Use subroutine realization forms. The display format for:

1

1 1

1 2 1

1 3 3 1

1 4 6 4 1

1 5 10 10 5 1