對C語言有一定基礎後 習題練習 練習將99乘法表依照指定格式列印出來-Based on the C language has some exercises to practice the exercises after the 99 multiplication table printed in the specified format

C语言打印九九乘法表，循环嵌套，循环结构实现-C language print multiplication table, nested loop, the loop structure to achieve