小编use*_*998的帖子

看看这段代码

#include<iostream>

using namespace std;

    //Shape is an Interface Class. No data and everything pure virtual
    class Shape {
    public:
      virtual void Area(int length, int breadth) = 0;
      virtual void Perimeter(int length, int breadth) = 0;
      //Note, no data
    };

    //Derived class - Inherits Shape as Public
    class Rectangle : public Shape {
    public:
      void Area(int length, int breadth);
      void Perimeter(int length, int breadth);
    private:
      int someData;
    };

    //Derived class - Inherits Shape as Public
    class Triangle : public Shape …

要创建一个opencl应用程序,第一步是通过使用来获取平台

clGetPlatformIDs 

我从功能返回的平台有问题;函数返回我有2个平台,但当我检查它时,我发现我有一个平台,但它是重复的!!

源代码

struct PLATFORM
{
    cl_platform_id _Platforms ;
    map <cl_platform_info , char*> _Platforms_info ;        
};

cl_int error ; 
cl_uint temp_num_platforms ;

error = clGetPlatformIDs (NULL , NULL , &temp_num_platforms );

if ( error != CL_SUCCESS )
{
    /* create error and debug function*/
    cout << " error detect platforms " << endl << endl ;
}
else
{
    cout << " we  detect " << temp_num_platforms << " platforms " << endl << endl ;

    _Platforms = std::unique_ptr …