vc随机字符串

0的ascii为48,z的ascii为122，因此只要获得这段区间的字符判断是否为字符或数字就行了  

代码如下:

 

CString   GenerateRandomStr(   void   )   
  {   
  char   *output   =   new   char[33];   //修改这里可以改变生成的字符串长度,下面要同时修改哦
  srand(   (unsigned)time(   NULL   )   );   
  char   c;   
  for(   int   a   =   0;   a   <   33;   a++   )   {   
  c   =   (   (rand()   %   74)   +   48   );   
  while(   !IsCharAlphaNumeric(   c   )   )   {   
  c   =   (   (rand()   %   74)   +   48   );   
    
  }   
  output[   a   ]   =   c;   
  }   
  output[   33   ]   =   '\0';   
  CString   out(output);    
  return   out;   
  }