实现银行之间或银行与其他单位之间的数据交换-Implementation between banks or between banks and other units of the data exchange

使用C语言编写的ISO8583协议的实现，没有使用其他库，使用最基本的函数-ISO8583 protocol implementation written in C, do not use other libraries, use the basic function

The folder contains a demo.c program to pack and unpack the msg using ISO8583 standards. This lacks the implementation of how to send the msg using a ISO header.