count=atoi(lr_eval_string("{T0_count}"));
srand(vid);
rand_id=rand()%count+1;
lr_output_message("rand number is %d",rand_id);
sprintf(task,"{T0_%d}",rand_id);
sprintf(task1,"%s",lr_eval_string(task));
lr_save_string(task1,"taskid2");
不过这个函数lr_whoami(&vid, &vuser_group, &scid);最后的scenario id 什么时候用?