tc实现了2-36进制的任意转换。多进制转十进制用的是按权展开，十进制转多进制用的是倒取余数。

注：10进制以上，分别用A表示10、B表示11、以此类推……参数中的n是进制数。-Achieve a 2-36 hex any conversion. Ary turn is based on the right of the decimal to start using decimal ary turn is used to take down the remainder.

NOTE: more than 10 decimal, respectively represented by A 10, B 11 represents, so ...... parameter n is the radix.