#include "project.h" #include "project2.h" void main(int argc,char *argv[]) { int a,b; project_int(&a,&b); project2_int(a,b); }
时间: 2024-05-25 17:14:49 浏览: 131
这是一个简单的 C 语言程序。
其中,`#include` 是预编译指令,用于引入头文件。`"project.h"` 和 `"project2.h"` 分别引入了两个头文件。
函数 `main()` 是程序的入口函数,参数 `argc` 表示命令行参数的个数,`char *argv[]` 表示命令行参数列表。
在 `main()` 函数中,首先定义了两个变量 `a` 和 `b`,然后调用了 `project_int()` 函数,该函数传入了 `a` 和 `b` 的地址,用于从外部获取这两个变量的值。接着调用了 `project2_int()` 函数,并将 `a` 和 `b` 的值传入该函数中进行处理。
由于缺少头文件和函数的具体实现,无法判断该程序的功能和正确性。
相关问题
接上一个问题,我在按照你的建议在链接路径中添加了.dll文件以后,不再出现缺少lib文件的问题,但是在本身运行没有问题的源文件代码和头文件代码中却开始了报错(注意,源文件和头文件本身并没有问题,在同样的文件内容下可以顺利生成静态库),我的文件内容为 main.cpp文件如下 #include "static/hello.h" int main(int argc, char* argv[]) { Hello hi; hi.print(); return 0; hello.h文件如下 #ifndef __HELLO_H__ #define __HELLO_H__ class Hello { public: void print(int a); }; #endif 提示的错误信息为:无法打开源文件“shared/hello.h”:No such file or directory(事实上他存在且路径正确且在生成静态库文件时可以顺利进行),未定义标识符“Hello”
根你提供的信息,可能出在头文件路径的配置上。在的CMakeLists.txt文件中,你使用了target_include_directories`命令来添加头文件路径,但这个命令只会对hello_library目标生效。
要解决这个问题,你需要在CMakeLists.txt文件中的`add_executable`命令之前添加类似的命令来指定头文件路径。例如:
```cmake
include_directories(${PROJECT_SOURCE_DIR}/include)
```
这样,CMake就能够在编译hello_binary可执行文件时找到头文件了。
另外,你的hello.h文件中的print函数声明有一个int类型的参数,但是在main.cpp中调用print函数时并没有传入参数。你可以根据需要修改函数的参数列表。
希望这次能够帮助到你。如果问题还存在,请提供更多详细的错误信息和代码,以便我能够更好地帮助你。
在ros项目中添加发送websocket wss消息的功能,修改如下代码并在CmakeLists.txt中添加依赖,实现将serialized_data发送到wss://autopilot-test.t3go.cn:443/api/v1/vehicle/push/message/LFB1FV696M2L43840。main.cpp:#include "ros/ros.h" #include "std_msgs/String.h" #include <boost/thread/locks.hpp> #include <boost/thread/shared_mutex.hpp> #include "third_party/apollo/proto/perception/perception_obstacle.pb.h" #include "t3_perception.pb.h" apollo::perception::PerceptionObstacles perception_obstacles_; void perceptionCallback(const std_msgs::String& msg) { ROS_WARN("t3 perceptionCallback parse"); if (perception_obstacles_.ParseFromString(msg.data)) { double timestamp = perception_obstacles_.header().timestamp_sec(); ROS_INFO("t3 perceptionCallback timestamp %f count:%d", timestamp, perception_obstacles_.perception_obstacle().size()); std::string data; perception_obstacles_.SerializeToString(&data); VehData veh_data; veh_data.set_messagetype(5); veh_data.set_messagedes("PerceptionObstacles"); veh_data.set_contents(data); std::string serialized_data; veh_data.SerializeToString(&serialized_data); } else { ROS_ERROR("t3 perceptionCallback parse fail!"); } } int main(int argc, char **argv) { ros::init(argc, argv, "listener"); ros::NodeHandle n; ros::Subscriber sub = n.subscribe("/perception_node/perception_objects", 1000, perceptionCallback); ros::spin(); return 0; }CMakeLists.txt:cmake_minimum_required(VERSION 3.0.2) project(t3) find_package(catkin REQUIRED COMPONENTS roscpp rospy pcl_ros std_msgs third_party ) find_package(Protobuf REQUIRED) include_directories(${Protobuf_INCLUDE_DIRS} ${CMAKE_CURRENT_BINARY_DIR}/..) find_package(Boost REQUIRED) include_directories(${Boost_INCLUDE_DIRS}) set(ixwebsocket_INCLUDE_DIR "/usr/local/include/ixwebsocket") set(ixwebsocket_LIBRARIES "/usr/local/lib/libixwebsocket.a") include_directories(${ixwebsocket_INCLUDE_DIR}) include_directories(${CATKIN_DEVEL_PREFIX}/${CATKIN_GLOBAL_INCLUDE_DESTINATION}/${PROJECT_NAME}) include_directories(${CATKIN_DEVEL_PREFIX}/${CATKIN_GLOBAL_INCLUDE_DESTINATION}/smartview) catkin_package(INCLUDE_DIRS ${PROJECT_INCLUDE_DIRS} DEPENDS ${GFLAGS_LIBRARIES} ) include_directories( ${catkin_INCLUDE_DIRS} ${PROTOBUF_INCLUDE_DIR} ${PROJECT_SOURCE_DIR}/.. ) add_executable(${PROJECT_NAME}_node src/main.cpp ) add_dependencies(${PROJECT_NAME}_node ${catkin_EXPORTED_TARGETS}) target_link_libraries(${PROJECT_NAME}_node ${catkin_LIBRARIES} ${PROTOBUF_LIBRARIES} smartview_proto ) install(TARGETS ${PROJECT_NAME}_node ARCHIVE DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION} LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION} RUNTIME DESTINATION ${CATKIN_GLOBAL_BIN_DESTINATION} )
你可以使用以下代码来添加发送websocket wss消息的功能,同时在CmakeLists.txt中添加依赖:
```cpp
#include "ros/ros.h"
#include "std_msgs/String.h"
#include <boost/thread/locks.hpp>
#include <boost/thread/shared_mutex.hpp>
#include "third_party/apollo/proto/perception/perception_obstacle.pb.h"
#include "t3_perception.pb.h"
#include <ixwebsocket/IXWebSocket.h>
using namespace ix;
apollo::perception::PerceptionObstacles perception_obstacles_;
void perceptionCallback(const std_msgs::String& msg) {
ROS_WARN("t3 perceptionCallback parse");
if (perception_obstacles_.ParseFromString(msg.data)) {
double timestamp = perception_obstacles_.header().timestamp_sec();
ROS_INFO("t3 perceptionCallback timestamp %f count:%d", timestamp, perception_obstacles_.perception_obstacle().size());
std::string data;
perception_obstacles_.SerializeToString(&data);
VehData veh_data;
veh_data.set_messagetype(5);
veh_data.set_messagedes("PerceptionObstacles");
veh_data.set_contents(data);
std::string serialized_data;
veh_data.SerializeToString(&serialized_data);
// create a WebSocket connection
WebSocket websocket;
websocket.setTLSOptions({}); // use default options
websocket.setOnMessageCallback([](const WebSocketMessagePtr& msg) {
std::cout << "Received message: " << msg->str << std::endl;
});
websocket.setOnCloseCallback([](WebSocket& ws, const WebSocketCloseInfo& info) {
std::cout << "WebSocket closed: " << info.reason << std::endl;
});
websocket.setOnErrorCallback([](const std::error_code& ec) {
std::cout << "Error: " << ec << ", error message: " << ec.message() << std::endl;
});
websocket.connect("wss://autopilot-test.t3go.cn:443/api/v1/vehicle/push/message/LFB1FV696M2L43840");
websocket.send(serialized_data);
websocket.close();
} else {
ROS_ERROR("t3 perceptionCallback parse fail!");
}
}
int main(int argc, char **argv) {
ros::init(argc, argv, "listener");
ros::NodeHandle n;
ros::Subscriber sub = n.subscribe("/perception_node/perception_objects", 1000, perceptionCallback);
ros::spin();
return 0;
}
```
在CmakeLists.txt中添加以下依赖:
```
find_package(ixwebsocket REQUIRED)
target_link_libraries(${PROJECT_NAME}_node ixwebsocket)
```
注意,你需要安装ixwebsocket库以使用WebSocket功能。
阅读全文