将C++中的多个参数传递给MatLab共享库函数

我已经在Matlab中实现了一个特征匹配算法，并试图使用共享库在我的C++应用程序中使用它。问题是，尽管我向函数传递了四个参数，但我只得到了一个参数的值。

Matlab函数：

[c, d, e, f] = fm_test("C:.jpg", "C:1.jpg");
function [FSC_1, FSC_2, NBCS_1, NBCS_2] = fm_test(path_im1, path_im2)
...
% Performed feature matching - output are 4 matrices with format n x 2 single
FSC_1 = matchedPoints1(inliersIndex, :);
FSC_2 = matchedPoints2(inliersIndex, :);  
NBCS_1 = matchedPoints1(inliers_NBCS, :);
NBCS_2 = matchedPoints2(inliers_NBCS, :);
end

我正在使用库编译器为C++创建共享库，并调用函数：

mclmcrInitialize();
//const char *args[] = { "-nojvm" };
//const int count = sizeof(args) / sizeof(args[0]);
if (!mclInitializeApplication(NULL, 0)) {
std::cerr << "Could not initialize the application properly" << std::endl;
return -1;
}
if (!fm_testInitialize()) {
std::cerr << "Could not initialize the library properly" << std::endl;
return -1;
}
else {
try {
for (size_t i = 0; i < cameras.size() - 1; ++i){
mwArray FSC_1, FSC_2, NBCS_1, NBCS_2;
mwArray path_1 = cameras[i].image_path.c_str();
mwArray path_2 = cameras[i+1].image_path.c_str();
fm_test(1, FSC_1, FSC_2, NBCS_1, NBCS_2, path_1, path_2);
// Convert mwArray to vector<double>
std::cout << " Printing sizes of mwArray" << std::endl;
std::cout << FSC_1.NumberOfElements() << std::endl; 
std::cout << FSC_2.NumberOfElements() << std::endl;
std::cout << NBCS_1.NumberOfElements() << std::endl;
std::cout << NBCS_2.NumberOfElements() << std::endl;
}

}
catch (const mwException& e) {
std::cerr << e.what() << std::endl;
return -2;
}
catch (...) {
std::cerr << "Unexpected error thrown" << std::endl;
return -3;
}
fm_testTerminate();

}

结果例如：

Printing sizes of mwArray
100 
0
0
0

是否可以向函数传递多个参数？我是否必须更具体地定义mwArray？