编译Cuda时出错-预期的主要表达式 [英] Error compiling Cuda - expected primary-expression

问题描述

这个程序似乎很好，但是我仍然会犯错，有些建议吗？

this program seems be fine but I still getting an erro, some suggestion?

程序：

#include "dot.h"
#include <cuda.h>
#include <cuda_runtime.h>
#include <stdio.h>

int main(int argc, char** argv)
{
    int *a, *b, *c;
    int *dev_a, *dev_b, *dev_c;
    int size = N * sizeof(int);

    cudaMalloc((void**)&dev_a, size);
    cudaMalloc((void**)&dev_b, size);
    cudaMalloc((void**)&dev_c, sizeof(int));

    a = (int *)malloc (size);
    b = (int *)malloc (size);
    c = (int *)malloc (sizeof(int));

    random_ints(a, N);
    random_ints(b, N);

    cudaMemcpy(dev_a, a, size, cudaMemcpyHostToDevice);
    cudaMemcpy(dev_b, b, size, cudaMemcpyHostToDevice);

    int res = N/THREADS_PER_BLOCK;
    dot<<< res, THREADS_PER_BLOCK >>> (dev_a, dev_b, dev_c);
    //helloWorld<<< dimGrid, dimBlock >>>(d_str);

    cudaMemcpy (c, dev_c, sizeof(int), cudaMemcpyDeviceToHost);

    free(a); free(b); free(c);
    cudaFree(dev_a);
    cudaFree(dev_b);
    cudaFree(dev_c);
    return 0;
}

错误：

DotProductCuda.cpp：27：错误：'<'令牌

DotProductCuda.cpp之前的预期主表达式：27：错误：'>'令牌

DotProductCuda.cpp:27: error: expected primary-expression before '<' token
DotProductCuda.cpp:27: error: expected primary-expression before '>' token

推荐答案

<<< >>> 用于调用内核的语法不是标准的C或C ++。这些调用必须在NVCC编译器编译的文件中。这些文件通常以.cu扩展名命名。其他对CUDA的API调用，例如 cudaMalloc 可以在常规.c或.cpp文件中。

The <<< >>> syntax for calling a kernel is not standard C or C++. Those calls must be in a file compiled by the NVCC compiler. Those files are normally named with a .cu extension. Other API calls to CUDA such as cudaMalloc can be in regular .c or .cpp files.

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