#ifndef __GPU_TIMER_H__#define __GPU_TIMER_H__struct GpuTimer{    cudaEvent_t start;    cudaEvent_t stop;    GpuTimer()    {        cudaEventCreate(&start);        cudaEventCreate(&stop);    }    ~GpuTimer()    {        cudaEventDestroy(start);        cudaEventDestroy(stop);    }    void Start()    {        cudaEventRecord(start, 0);    }    void Stop()    {        cudaEventRecord(stop, 0);    }    float Elapsed()    {        float elapsed;        cudaEventSynchronize(stop);        cudaEventElapsedTime(&elapsed, start, stop);        return elapsed;    }};#endif  /* __GPU_TIMER_H__ */

     尝试添加gputimer.h头文件，一直失败。后来发现是头文件不对，换了头文件之后就成功了。gputimer.h头文件添加路径：.../cuda/cudatoolkit/include/