说明：  数据加密程序。数据是四位整数，传递过程需要加密，规则如下：每位数字都加上5，然后用和除以10的余数代替该字，再将第一位和第四位的交换，第二位跟第三位交换，用C语言完成。
(Data encryption programs. The data is four integers, transmission process requires encryption, the rules are as follows: Each figures with five, and then divided by 10 instead of the remainder of the word, and then the first and fourth exchange, the second with the the third exchange, complete with the C language.)