'nullptr' was not declared in this scope 问题是编译器没有开启C++11特性。 如果直接使用gcc/g++, 在 gcc /g++参数中添加 -std=c11 / -std=c++11 即: g++-g-Wall-std=c++11main.cpp gcc-g-Wall-std=c11main.cpp 1. 2. 3. 注意: 需要更新gcc/g++版本。 5以
##nullptr was not declared in this scope 1,如果你的gcc编译器部分支持C++11,你可以添加编译选项开启支持C++11。4.4.7可以这样开启:g++ -std=c++0x cjjjs.cpp 2,只要将C++11特性的代码等价替换为旧标准C++代码即可。nullptr是C++11引入的,表示空指针。那么我们以前的空指针要么使用宏NULL表示,要么直接使用0表示。
D:\opencv-3.4.1\opencv-3.4.1\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc:94:15: error:'nullptr'was not declared inthisscope returns ==nullptr|| *s == 0; ^ 3rdparty\protobuf\CMakeFiles\libprotobuf.dir\build.make:412: recipefortarget'3rdparty/protobuf/CMakeFiles/libproto...
D:\opencv-3.4.1\opencv-3.4.1\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc:94:15: error: 'nullptr' was not declared in this scope return s == nullptr || *s == 0; ^ 3rdparty\protobuf\CMakeFiles\libprotobuf.dir\build.make:412: recipe for target '3rdparty/protobuf/CM...
error: ‘cout’ was not declared in this scope error: ‘endl’ was not declared in this scope 1. 2. 3. 4. 没有头文件怎么办呢?这需要安装兼容包,在我的64位系统安装了下面2个包(还有其他包) # yum install compat-gcc* Install compat-gcc-34.x86_64 ...
/tools/icad/src/uncrustify/0.66.1/src/align.cpp:456: error: 'nullptr' was not declared in this scope /tools/icad/src/uncrustify/0.66.1/src/align.cpp: In function 'void align_oc_msg_spec(size_t)': /tools/icad/src/uncrustify/0.66.1/src/align.cpp:513: error: 'nullptr' was not decla...
This changes std::create_directory to check whether the target was already a directory on failure. Previously, all ERROR_ALREADY_EXISTS type errors were turned into success-but-directory-not-created codes.operator<<(std::ostream, nullptr_t)...
/ws/ORB_SLAM2/src/LoopClosing.cc:84:20: error: ‘usleep’ was not declared in this scope usleep(5000);需要打开相应的代码,在头文件里面添加usleep 的头文件unistd.h,问题就解决了!參考“http://blog.csdn.net/wangshuailpp/article/details/70226534”//... 好文要顶 关注我 收藏该文 微信分享 ...
string转int,遇到‘stoi’ was not declared in this scope 需要加-std=c++11 int stoi (const string& str, size_t* idx = 0, int base = 10); int stoi (const wstring& str, size_t* idx = 0, int base = 10); string str = "2"; int i = std::stoi (str,nullptr,10); ///int转...
Compiler warning (level 4, off) C4986 'declaration': exception specification does not match previous declaration Compiler warning (level 4, off) C4987 nonstandard extension used: 'throw (...)' Compiler warning (level 4, off) C4988 'variable': variable declared outside class/function ...