In computer science, a pointer is a programming language data type whose value refers directly to (or "points to") another value stored elsewhere in the computer memory using its address.
簡單來說 指標變數就是指出資料存在哪個記憶體位址,也就是指標變數就是一個記憶體位置記錄器,如下圖(轉至wiki)
//include 系統內建函數
#include <plib.h>
#include <stdio.h>
//include 自建函數
#include "UART.h"
#include "Parameter.h"
//變數宣告 其他C檔也會用到此變數
unsigned char ZigState;
int main(void);
{
...
while(1);
}