来源:学生作业帮 编辑:搜搜考试网作业帮 分类:综合作业 时间:2024/06/04 10:57:10
map_iter->second
程序运行到if(map_iter->second > 0)是报map set iterator not dereferencable
map::reverse_iterator map_iter = mapval.rbegin();
for(; map_iter != mapval.rend(); map_iter++)
iterator都是从begin()开始到end()结束,哪怕逆向也是一样