解决：error- ISO C++ forbids declaration of ‘point’ with no type [-fpermissive]

科技前沿 • 2025-01-15 17:25 • 阅读 38

大家好，我是讯享网，很高兴认识大家。

问题描述：

刚开始跟着PCL tutorials官方教程学习PCL点云库，先创建pcd_write.cpp文件，然后编写CMakeLists.txt文件，官方提供的CMakeLists.txt文件内容如下：

cmake_minimum_required(VERSION 2.8 FATAL_ERROR) project(pcd_write) find_package(PCL 1.2 REQUIRED) include_directories(${PCL_INCLUDE_DIRS}) link_directories(${PCL_LIBRARY_DIRS}) add_definitions(${PCL_DEFINITIONS}) add_executable (pcd_write pcd_write.cpp) target_link_libraries (pcd_write ${PCL_LIBRARIES})

讯享网

编译：

在当前目录下打开终端并进行cmake编译，

讯享网mkdir build cd build cmake .. make

编译后报如下错误：

讯享网

error: ISO C++ forbids declaration of ‘point’ with no type [-fpermissive] for (auto& point: cloud) warning: range-based ‘for’ loops only available with -std=c++11 or -std=gnu++11 for (auto& point: cloud) error: request for member ‘y’ in ‘point’, which is of non-class type ‘int’ point.y = 1024 * rand () / (RAND_MAX + 1.0f); error: request for member ‘y’ in ‘point’, which is of non-class type ‘int’ point.y = 1024 * rand () / (RAND_MAX + 1.0f); error: request for member ‘z’ in ‘point’, which is of non-class type ‘int’ point.z = 1024 * rand () / (RAND_MAX + 1.0f);

解决方案：

从第二句warning的警告可以知道基于范围的for循环仅适用于-std=c++11 或 -std=gnu++11标准，因此需要在CMakeLists.txt文件中加入C++11标准，最终的CMakeLists.txt文件内容如下：

讯享网cmake_minimum_required(VERSION 2.8 FATAL_ERROR) # 指定为C++11 标准 set(CMAKE_CXX_STANDARD 11) project(pcd_write) find_package(PCL 1.2 REQUIRED) include_directories(${PCL_INCLUDE_DIRS}) link_directories(${PCL_LIBRARY_DIRS}) add_definitions(${PCL_DEFINITIONS}) add_executable (pcd_write pcd_write.cpp) target_link_libraries (pcd_write ${PCL_LIBRARIES})

接下来就可以顺利通过编译了。

解决：error- ISO C++ forbids declaration of ‘point’ with no type [-fpermissive]

问题描述：

编译：

解决方案：

相关推荐