【Qt】随机字符串

Qt生成自定义字符串

	qsrand(QDateTime::currentMSecsSinceEpoch());
	const char ch[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
	int size = sizeof(ch);
	char* str = new char[nLen + 1];
	int num = 0;
	for (int nIndex = 0; nIndex < nLen; ++nIndex)
	{
		num = rand() % (size - 1);
		str[nIndex] = ch[num];
	}
	str[nLen] = '\0';
 
	QString res(str);
 
    QLOG_INFO() << __FUNCTION__ << __LINE__ << res;
 
    m_RandomCode = res;