用结构体解析Pascal字符串

 1 //利用结构体读取Pascal串
 2 
 3 #include <stdlib.h>
 4 #include <stdio.h>
 5 
 6 struct StrPascal
 7 {
 8     unsigned short int nLength;
 9     char string[0];  //结构体中柔性数组
10 };
11 
12 int main()
13 {
14     unsigned char PascalData[48] = {
15         0x0C, 0x00, 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x77, 0x6F, 0x72, 0x6C, 0x64, 0x21, 0x0D, 0x00,
16         0x77, 0x77, 0x77, 0x2E, 0x70, 0x65, 0x64, 0x69, 0x79, 0x2E, 0x63, 0x6F, 0x6D, 0x04, 0x00, 0x6A,
17         0x6A, 0x79, 0x79, 0x03, 0x00, 0x43, 0x2B, 0x2B, 0x06, 0x00, 0x62, 0x61, 0x63, 0x6B, 0x65, 0x72
18     };
19 
20     struct StrPascal *pStrPascal = (struct StrPascal *)PascalData;  //定义结构体指针，并赋值强转后的数组指针
21 
22     while ((int)pStrPascal < (int)PascalData + sizeof(PascalData))  //指针数值小于 原数组首地址加总大小 则继续
23     {
24         for (int i = 0; i < pStrPascal->nLength; i++) //按数组中存放的字符串长度输出
25         {
26             putchar(pStrPascal->string[i]);
27         }
28         
29         //指针重新赋值    当前指针地址 + 2个字节（存储字符串长度所占用的内存空间） + 当前字符串长度
30         pStrPascal = (struct StrPascal *)((int)pStrPascal + sizeof(pStrPascal->nLength) + pStrPascal->nLength);
31         puts("");
32     }
33 
34     system("pause");
35     return 0;
36 }