摘要:
std是一个类(输入输出标准),它包括了cin成员和cout成员,using name space std ;以后才能使用它的成员。#include<iostream.h>中不存在类std,但是他又cin,out的相关函数,不需要使用命名空间了。而第二种标准#include<iostream>,它包 阅读全文
摘要:
As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some ro 阅读全文