C語言中unsigned char* 和 const char*的互相轉換

1.unsigned char*轉換成const char*

先將unsigned char*轉換成char*，再將char*轉換成const char*

unsigned char *pstr；
const char* p = (const char*)(char*)pstr;

2.const char*轉換成unsigned char*

const char* p;
unsigned char * pstr = (unsigned char*)p;