摘要:
Sales_item.h#ifndef SALES_ITEM_H#define SALES_ITEM_H#include#includeusing namespace std;class Sales_item{ friend ostream& operator>(istream &is,Sal... 阅读全文
摘要:
Setting->Compiler直接在“Have g++ follow the C++11 ISO C++ language standard [-std=c++11]” 选项上打勾 保存就可以了 阅读全文