http://www.cnblogs.com/KevinYang/archive/2010/06/18/1760597.html
http://blog.csdn.net/gogor/article/details/5323599
http://www.iteye.com/topic/398782
1 /* convert hex string to str*/ 2 3 #include <stdio.h> 4 5 int main() 6 { 7 unsigned char str[4] ; 8 str[0] = 0x41; 9 str[1] = 0x42; 10 str[2] = 0x43; 11 str[3] = ' '; 12 13 printf("str= %s ", str); 14 15 return 0; 16 }