1，去除变量的const属性：
http://www.cnblogs.com/ider/archive/2011/07/22/cpp_cast_operator_part2.html
2，strcpy：将const char *指向的值赋给char数组，
http://www.360doc.com/content/12/0725/10/219024_226333196.shtml
http://wenwen.soso.com/z/q5186051.htm
原文：http://blog.csdn.net/zhanzhan0329/article/details/22290117