QT生成固定长度的随机字符串

 1 QString getRandomString(int length)
 2 {
 3     qsrand(QDateTime::currentMSecsSinceEpoch());//为随机值设定一个seed
 4     const char chrs[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 5     int chrs_size = sizeof(chrs);
 6 
 7     char* ch = new char[length + 1];
 8     memset(ch, 0, length + 1);
 9     int randomx = 0;
10     for (int i = 0; i < length; ++i)
11     {
12         randomx= qrand() % (chrs_size - 1);
13         ch[i] = chrs[randomx];
14     }
15 
16     QString ret(ch);
17     delete[] ch;
18     return ret;
19 }