Qt 产生随机字符数组

定义一个数组，用随机字符来填充这个数组

const char *c = "0123456789abcdefghijklmnopqrstuvwxyz";    //可填充的字符
char* MsgBuffer = new char[ulMsgLength];       //定义一个ulMsgLength长度的字符数组
memset(MsgBuffer, 0, ulMsgLength);	      //初始化数组，都置零
for (int i = 0; i < ulMsgLength;i++)
{
	int index = rand() % strlen(c);
	MsgBuffer[i] = c[index];
}