cuda

#include <iostream>

static const int N = 10;

void add ( int *a, int *b, int *c ) {
    for ( int id = 0; id < N; ++id ) {
        c[id] = a[id] + b[id];
    }
}

int main () {
    int a[N], b[N], c[N];
    int *dev_a, *dev_b, *dev_c;

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

    for ( int i = 0; i < N; ++i ) {
        a[i] = i;
        b[i] = i * i;
    }

    cudaMemcpy( dev_a, a, N * sizeof(int), cudaMemcpyKind::cudaMemcpyHostToDevice );
    cudaMemcpy( dev_b, b, N * sizeof(int), cudaMemcpyKind::cudaMemcpyHostToDevice );
    add <<< 1,1 >>> ( dev_a, dev_b, dev_c );

    cudaMemcpy( dev_c, c, N * sizeof(int), cudaMemcpyKind::cudaMemcpyDeviceToHost );

    cudaFree( dev_a );
    cudaFree( dev_b );
    cudaFree( dev_c );

    for ( int i = 0; i < N; ++i ) {
        std::cout << a[i] << " + " << b[i] << " = " << c[i] << std::endl;
    }

    return 0;
}


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$> nvcc add_vector.cu -o add_vector
add_vector.cu(24): error: name followed by "::" must be a class or namespace name

add_vector.cu(25): error: name followed by "::" must be a class or namespace name

add_vector.cu(26): error: a host function call cannot be configured

add_vector.cu(28): error: name followed by "::" must be a class or namespace name

4 errors detected in the compilation of "/tmp/tmpxft_000046f1_00000000-4_add_vector.cpp1.ii".