自定义生成IFC globalID的函数

自定义生成IFC  globalID的函数

.h文件

#include <QChar>
#include <cstdlib>
#include <ctime>

QString createGlobalID();

.cpp文件

QString createGlobalID()
{
    QChar chars[36] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k','l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w','x', 'y', 'z','0','1','2','3','4','5','6','7','8','9' };
    QString newGlobalID = "";
    
    //srand((int)time(0));  
    srand((unsigned)time(NULL));
    for (int k=0;k<11;++k)
    {
        int index_num = rand()% 36;

        newGlobalID.append(chars[index_num]);
    }
    return newGlobalID;
}

测试

QString globalIDStr1 = createGlobalID();
QString globalIDStr2 = createGlobalID();
QString globalIDStr3 = createGlobalID();

输出结果

 "d7wvembqeir"
 "j44h7s83hxj"
 "tldbj0dd8l7"