C++ Primer Sales_item.h:56:20: warning: defaulted and deleted functions only available with -std=c++

最新推荐文章于 2021-10-29 10:27:41 发布

只因你是晴空

最新推荐文章于 2021-10-29 10:27:41 发布

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本文记录了在使用C++ Primer一书进行编程练习时遇到的编译错误，主要原因是编译器不支持C++11标准。通过在编译命令中加入-std=c++11参数，成功解决了Sales_item类构造函数和数据成员初始化的问题。

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学习C++ Primer这本书，在敲练习1.20的时候出现这样的错误

In file included from test.cpp:2:0:
Sales_item.h:56:20: warning: defaulted and deleted functions only available with -std=c++11 or -std=gnu++11
     Sales_item() = default;
                    ^
Sales_item.h:70:27: warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11
     unsigned units_sold = 0; // explicitly initialized
                           ^
Sales_item.h:71:22: warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11
     double revenue = 0.0;
                      ^
Sales_item.h:45:7: error: constructor required before non-static data member for ‘Sales_item::units_sold’ has been parsed
 class Sales_item {
       ^
Sales_item.h:45:7: error: constructor required before non-static data member for ‘Sales_item::revenue’ has been parsed

在网上搜了一下，好像是因为编译器不支持C++11标准

解决办法：在编译时加上 -std=c++11

即编译时输入命令