关于namespace的使用

#include <string>

#include <pcl/io/pcd_io.h>

#include <pcl/point_types.h>

int main (int argc, char** argv){

pcl::PCLPointCloud2::Ptr cloud_blob (new pcl::PCLPointCloud2);

string pcdfile = (string) argv[1];

pcl::PCDReader reader;

reader.read (pcdfile, *cloud_blob);

std::cerr << "PointCloud before filtering: " << cloud_blob->width * cloud_blob->height << " data points." << std::endl;

return 0;
}

 

采用cmake3.1编译，报错：

error: ‘string’ was not declared in this scope.

 

解决方案：

1. 添加 

using namespace std;

或者

2. 修改

std::string pcdfile = (string) argv[1];

 

　　

转载于:https://www.cnblogs.com/gdut-gordon/p/8672952.html