输入 1 个正整数 n(1≤n≤10), 输出一张 20 以内的加法口诀表. 加数与被加数都不大于 n, 分列第一行和第一列.(将加数、被加数、和放入一个二维数组中, 再输出该数组)-Enter a positive integer n (1 ≤ n ≤ 10), the output of the addition formulas within a 20 table. Addends is not greater than n, breakdown of the first row an