c语言下根据用户的输入进行进制转换，第一个是10进制数，第二个是想转的格式（2,8,16）-c language based on user input for the next binary conversion, the first one is 10 decimal, the second is to switch the format (2,8,16)

对数组元素排序 任意进制数的转换 判断回文数(Sort the array elements Conversion of arbitrary numbers Determine the number of palindrome)