这是个让用户选择行数 和图形后输出一个空心的倒三角形和实心三形角小程序-This is to allow users to select the number of rows and graphics output after a hollow and solid inverted triangle-shaped angle three small programs

用java 语言打印三角形，正三角形，倒三角形，菱形，空心菱形 代码-Using java language print triangle, triangle, inverted triangle, diamond, hollow diamond code

c语言入门级作业，运行后显示空心倒三角形，可自行更改行数，for循环，简单易懂(display a inverted triangle)